166107987402 has 16 divisors (see below), whose sum is σ = 379675399872. Its totient is φ = 47459424960.

The previous prime is 166107987389. The next prime is 166107987433. The reversal of 166107987402 is 204789701661.

It is a super-3 number, since 3×166107987402³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977475999 + ... + 1977476082.

It is an arithmetic number, because the mean of its divisors is an integer number (23729712492).

Almost surely, 2^166107987402 is an apocalyptic number.

166107987402 is an abundant number, since it is smaller than the sum of its proper divisors (213567412470).

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

166107987402 is a wasteful number, since it uses less digits than its factorization.

166107987402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954952093.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 166107987402 in words is "one hundred sixty-six billion, one hundred seven million, nine hundred eighty-seven thousand, four hundred two".