165164477 has 4 divisors (see below), whose sum is σ = 166177920. Its totient is φ = 164151036.

The previous prime is 165164459. The next prime is 165164507. The reversal of 165164477 is 774461561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 774461561 = 31 ⋅24982631.

It is a cyclic number.

It is not a de Polignac number, because 165164477 - 2⁸ = 165164221 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 (165164977) 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, 506477 + ... + 506802.

It is an arithmetic number, because the mean of its divisors is an integer number (41544480).

Almost surely, 2^165164477 is an apocalyptic number.

It is an amenable number.

165164477 is a deficient number, since it is larger than the sum of its proper divisors (1013443).

165164477 is a wasteful number, since it uses less digits than its factorization.

165164477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013442.

The product of its digits is 141120, while the sum is 41.

The square root of 165164477 is about 12851.6332425105. The cubic root of 165164477 is about 548.6628420995.

The spelling of 165164477 in words is "one hundred sixty-five million, one hundred sixty-four thousand, four hundred seventy-seven".