165791077 has 2 divisors, whose sum is σ = 165791078. Its totient is φ = 165791076.

The previous prime is 165791051. The next prime is 165791083. The reversal of 165791077 is 770197561.

It is a happy number.

165791077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164711556 + 1079521 = 12834^2 + 1039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165791077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165791047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82895538 + 82895539.

It is an arithmetic number, because the mean of its divisors is an integer number (82895539).

Almost surely, 2^165791077 is an apocalyptic number.

It is an amenable number.

165791077 is a deficient number, since it is larger than the sum of its proper divisors (1).

165791077 is an equidigital number, since it uses as much as digits as its factorization.

165791077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92610, while the sum is 43.

The square root of 165791077 is about 12875.9883892461. The cubic root of 165791077 is about 549.3558044488.

The spelling of 165791077 in words is "one hundred sixty-five million, seven hundred ninety-one thousand, seventy-seven".