165337391477 has 4 divisors (see below), whose sum is σ = 165340728096. Its totient is φ = 165334054860.

The previous prime is 165337391473. The next prime is 165337391489. The reversal of 165337391477 is 774193733561.

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 a cyclic number.

It is not a de Polignac number, because 165337391477 - 2² = 165337391473 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 (165337391473) 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, 1592843 + ... + 1693464.

It is an arithmetic number, because the mean of its divisors is an integer number (41335182024).

Almost surely, 2^165337391477 is an apocalyptic number.

It is an amenable number.

165337391477 is a deficient number, since it is larger than the sum of its proper divisors (3336619).

165337391477 is an equidigital number, since it uses as much as digits as its factorization.

165337391477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336618.

The product of its digits is 10001880, while the sum is 56.

The spelling of 165337391477 in words is "one hundred sixty-five billion, three hundred thirty-seven million, three hundred ninety-one thousand, four hundred seventy-seven".