166921035764 has 24 divisors (see below), whose sum is σ = 334003541760. Its totient is φ = 71502986016.

The previous prime is 166921035761. The next prime is 166921035793. The reversal of 166921035764 is 467530129661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166921035761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382732 + ... + 1498595.

It is an arithmetic number, because the mean of its divisors is an integer number (13916814240).

Almost surely, 2^166921035764 is an apocalyptic number.

166921035764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166921035764 is an abundant number, since it is smaller than the sum of its proper divisors (167082505996).

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

166921035764 is a wasteful number, since it uses less digits than its factorization.

166921035764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883407 (or 2883405 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 166921035764 in words is "one hundred sixty-six billion, nine hundred twenty-one million, thirty-five thousand, seven hundred sixty-four".