165950790677 has 4 divisors (see below), whose sum is σ = 189658046496. Its totient is φ = 142243534860.

The previous prime is 165950790671. The next prime is 165950790713. The reversal of 165950790677 is 776097059561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 165950790677 - 2⁶ = 165950790613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165950790671) 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, 11853627899 + ... + 11853627912.

It is an arithmetic number, because the mean of its divisors is an integer number (47414511624).

Almost surely, 2^165950790677 is an apocalyptic number.

It is an amenable number.

165950790677 is a deficient number, since it is larger than the sum of its proper divisors (23707255819).

165950790677 is an equidigital number, since it uses as much as digits as its factorization.

165950790677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23707255818.

The product of its (nonzero) digits is 25004700, while the sum is 62.

The spelling of 165950790677 in words is "one hundred sixty-five billion, nine hundred fifty million, seven hundred ninety thousand, six hundred seventy-seven".