166698520074 has 32 divisors (see below), whose sum is σ = 370484293440. Its totient is φ = 55559702736.

The previous prime is 166698520069. The next prime is 166698520123. The reversal of 166698520074 is 470025896661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 166698520074.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300024 + ... + 650700.

It is an arithmetic number, because the mean of its divisors is an integer number (11577634170).

Almost surely, 2^166698520074 is an apocalyptic number.

166698520074 is an abundant number, since it is smaller than the sum of its proper divisors (203785773366).

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

166698520074 is a wasteful number, since it uses less digits than its factorization.

166698520074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359491 (or 359485 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 166698520074 in words is "one hundred sixty-six billion, six hundred ninety-eight million, five hundred twenty thousand, seventy-four".