669854902828032 has 132 divisors (see below), whose sum is σ = 1996584770022336. Its totient is φ = 216082226626560.

The previous prime is 669854902827991. The next prime is 669854902828039. The reversal of 669854902828032 is 230828209458966.

669854902828032 is a `hidden beast` number, since 6 + 6 + 9 + 8 + 5 + 490 + 28 + 2 + 80 + 32 = 666.

It is a super-2 number, since 2×669854902828032² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669854902828039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1172035413 + ... + 1172606804.

Almost surely, 2^{669854902828032} is an apocalyptic number.

669854902828032 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

669854902828032 is an abundant number, since it is smaller than the sum of its proper divisors (1326729867194304).

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

669854902828032 is a wasteful number, since it uses less digits than its factorization.

669854902828032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344642274 (or 2344642253 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 72.

The spelling of 669854902828032 in words is "six hundred sixty-nine trillion, eight hundred fifty-four billion, nine hundred two million, eight hundred twenty-eight thousand, thirty-two".