165490877678 has 8 divisors (see below), whose sum is σ = 283698647472. Its totient is φ = 70924661856.

The previous prime is 165490877603. The next prime is 165490877683. The reversal of 165490877678 is 876778094561.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5910388475 + ... + 5910388502.

It is an arithmetic number, because the mean of its divisors is an integer number (35462330934).

Almost surely, 2^165490877678 is an apocalyptic number.

165490877678 is a deficient number, since it is larger than the sum of its proper divisors (118207769794).

165490877678 is a wasteful number, since it uses less digits than its factorization.

165490877678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820776986.

The product of its (nonzero) digits is 142248960, while the sum is 68.

The spelling of 165490877678 in words is "one hundred sixty-five billion, four hundred ninety million, eight hundred seventy-seven thousand, six hundred seventy-eight".