166504666739 has 8 divisors (see below), whose sum is σ = 167021611680. Its totient is φ = 165988348416.

The previous prime is 166504666717. The next prime is 166504666759. The reversal of 166504666739 is 937666405661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166504666739 - 2²⁰ = 166503618163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166504666759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378437 + ... + 690089.

It is an arithmetic number, because the mean of its divisors is an integer number (20877701460).

Almost surely, 2^166504666739 is an apocalyptic number.

166504666739 is a deficient number, since it is larger than the sum of its proper divisors (516944941).

166504666739 is a wasteful number, since it uses less digits than its factorization.

166504666739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313309.

The product of its (nonzero) digits is 29393280, while the sum is 59.

The spelling of 166504666739 in words is "one hundred sixty-six billion, five hundred four million, six hundred sixty-six thousand, seven hundred thirty-nine".