165240377566 has 32 divisors (see below), whose sum is σ = 291878899200. Its totient is φ = 69366269280.

The previous prime is 165240377521. The next prime is 165240377573. The reversal of 165240377566 is 665773042561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5615706 + ... + 5645053.

It is an arithmetic number, because the mean of its divisors is an integer number (9121215600).

Almost surely, 2^165240377566 is an apocalyptic number.

165240377566 is a deficient number, since it is larger than the sum of its proper divisors (126638521634).

165240377566 is a wasteful number, since it uses less digits than its factorization.

165240377566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11260824.

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 165240377566 in words is "one hundred sixty-five billion, two hundred forty million, three hundred seventy-seven thousand, five hundred sixty-six".