669288727800 has 1728 divisors, whose sum is σ = 2982334118400. Its totient is φ = 136515456000.

The previous prime is 669288727753. The next prime is 669288727843. The reversal of 669288727800 is 8727882966.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 2922658086 + ... + 2922658314.

It is an arithmetic number, because the mean of its divisors is an integer number (1725887800).

Almost surely, 2^669288727800 is an apocalyptic number.

669288727800 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 669288727800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1491167059200).

669288727800 is an abundant number, since it is smaller than the sum of its proper divisors (2313045390600).

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

669288727800 is a wasteful number, since it uses less digits than its factorization.

669288727800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 669288727800 in words is "six hundred sixty-nine billion, two hundred eighty-eight million, seven hundred twenty-seven thousand, eight hundred".