166660650516 has 12 divisors (see below), whose sum is σ = 388874851232. Its totient is φ = 55553550168.

The previous prime is 166660650493. The next prime is 166660650517. The reversal of 166660650516 is 615056066661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166660650517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6944193760 + ... + 6944193783.

Almost surely, 2^166660650516 is an apocalyptic number.

It is an amenable number.

166660650516 is an abundant number, since it is smaller than the sum of its proper divisors (222214200716).

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

166660650516 is a wasteful number, since it uses less digits than its factorization.

166660650516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13888387550 (or 13888387548 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 166660650516 in words is "one hundred sixty-six billion, six hundred sixty million, six hundred fifty thousand, five hundred sixteen".