665169402552 has 64 divisors (see below), whose sum is σ = 1685888743680. Its totient is φ = 218661772032.

The previous prime is 665169402523. The next prime is 665169402553. The reversal of 665169402552 is 255204961566.

It is a super-2 number, since 2×665169402552² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665169402495 and 665169402504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665169402553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23404783 + ... + 23433185.

It is an arithmetic number, because the mean of its divisors is an integer number (26342011620).

Almost surely, 2^665169402552 is an apocalyptic number.

It is an amenable number.

665169402552 is an abundant number, since it is smaller than the sum of its proper divisors (1020719341128).

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

665169402552 is a wasteful number, since it uses less digits than its factorization.

665169402552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41852 (or 41848 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 665169402552 in words is "six hundred sixty-five billion, one hundred sixty-nine million, four hundred two thousand, five hundred fifty-two".