166320405365 has 8 divisors (see below), whose sum is σ = 201108032928. Its totient is φ = 132040626640.

The previous prime is 166320405353. The next prime is 166320405371. The reversal of 166320405365 is 563504023661.

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

It is a de Polignac number, because none of the positive numbers 2^k-166320405365 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 126961487 + ... + 126962796.

It is an arithmetic number, because the mean of its divisors is an integer number (25138504116).

Almost surely, 2^166320405365 is an apocalyptic number.

It is an amenable number.

166320405365 is a deficient number, since it is larger than the sum of its proper divisors (34787627563).

166320405365 is a wasteful number, since it uses less digits than its factorization.

166320405365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253924419.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 166320405365 in words is "one hundred sixty-six billion, three hundred twenty million, four hundred five thousand, three hundred sixty-five".