166389370002 has 24 divisors (see below), whose sum is σ = 360519289884. Its totient is φ = 55461740544.

The previous prime is 166389369989. The next prime is 166389370009. The reversal of 166389370002 is 200073983661.

166389370002 is a `hidden beast` number, since 1 + 6 + 638 + 9 + 3 + 7 + 0 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 159505183161 + 6884186841 = 399381^2 + 82971^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166389370002.

It is not an unprimeable number, because it can be changed into a prime (166389370009) 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, 841458 + ... + 1020210.

Almost surely, 2^166389370002 is an apocalyptic number.

166389370002 is an abundant number, since it is smaller than the sum of its proper divisors (194129919882).

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

166389370002 is a wasteful number, since it uses less digits than its factorization.

166389370002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230474 (or 230471 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 166389370002 in words is "one hundred sixty-six billion, three hundred eighty-nine million, three hundred seventy thousand, two".