165752977 has 8 divisors (see below), whose sum is σ = 180510120. Its totient is φ = 151282560.

The previous prime is 165752971. The next prime is 165752987. The reversal of 165752977 is 779257561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2143296 + 163609681 = 1464^2 + 12791^2 .

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

It is not a de Polignac number, because 165752977 - 2⁷ = 165752849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165752977.

It is not an unprimeable number, because it can be changed into a prime (165752971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70474 + ... + 72787.

It is an arithmetic number, because the mean of its divisors is an integer number (22563765).

Almost surely, 2^165752977 is an apocalyptic number.

It is an amenable number.

165752977 is a deficient number, since it is larger than the sum of its proper divisors (14757143).

165752977 is a wasteful number, since it uses less digits than its factorization.

165752977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143363.

The product of its digits is 926100, while the sum is 49.

The square root of 165752977 is about 12874.5088061642. The cubic root of 165752977 is about 549.3137192332.

The spelling of 165752977 in words is "one hundred sixty-five million, seven hundred fifty-two thousand, nine hundred seventy-seven".