669264353280 has 480 divisors, whose sum is σ = 2421591091920. Its totient is φ = 176779100160.

The previous prime is 669264353227. The next prime is 669264353299. The reversal of 669264353280 is 82353462966.

It is a happy number.

669264353280 is a `hidden beast` number, since 6 + 6 + 9 + 2 + 6 + 4 + 353 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 88746310 + ... + 88753850.

Almost surely, 2^669264353280 is an apocalyptic number.

669264353280 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 669264353280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1210795545960).

669264353280 is an abundant number, since it is smaller than the sum of its proper divisors (1752326738640).

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

669264353280 is a wasteful number, since it uses less digits than its factorization.

669264353280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687 (or 7658 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 669264353280 in words is "six hundred sixty-nine billion, two hundred sixty-four million, three hundred fifty-three thousand, two hundred eighty".