669411685800 has 1344 divisors, whose sum is σ = 2778091565760. Its totient is φ = 147806208000.

The previous prime is 669411685799. The next prime is 669411685801. The reversal of 669411685800 is 8586114966.

669411685800 is a `hidden beast` number, since 6 + 6 + 9 + 41 + 16 + 8 + 580 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (669411685799) and next prime (669411685801).

It is a super-2 number, since 2×669411685800² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (669411685801) by changing a digit.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 2022391635 + ... + 2022391965.

It is an arithmetic number, because the mean of its divisors is an integer number (2067032415).

Almost surely, 2^669411685800 is an apocalyptic number.

669411685800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669411685800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389045782880).

669411685800 is an abundant number, since it is smaller than the sum of its proper divisors (2108679879960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669411685800 is a wasteful number, since it uses less digits than its factorization.

669411685800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 669411685800 in words is "six hundred sixty-nine billion, four hundred eleven million, six hundred eighty-five thousand, eight hundred".