165527977 has 2 divisors, whose sum is σ = 165527978. Its totient is φ = 165527976.

The previous prime is 165527951. The next prime is 165527993. The reversal of 165527977 is 779725561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164326761 + 1201216 = 12819^2 + 1096^2 .

It is an emirp because it is prime and its reverse (779725561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165527977 - 2¹⁹ = 165003689 is a prime.

It is a super-2 number, since 2×165527977² = 54799022339425058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165527977.

It is not a weakly prime, because it can be changed into another prime (165527917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82763988 + 82763989.

It is an arithmetic number, because the mean of its divisors is an integer number (82763989).

Almost surely, 2^165527977 is an apocalyptic number.

It is an amenable number.

165527977 is a deficient number, since it is larger than the sum of its proper divisors (1).

165527977 is an equidigital number, since it uses as much as digits as its factorization.

165527977 is an odious number, because the sum of its binary digits is odd.

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

The square root of 165527977 is about 12865.7676413030. The cubic root of 165527977 is about 549.0650529027.

The spelling of 165527977 in words is "one hundred sixty-five million, five hundred twenty-seven thousand, nine hundred seventy-seven".