165523760077 has 6 divisors (see below), whose sum is σ = 179235787722. Its totient is φ = 152791162992.

The previous prime is 165523760053. The next prime is 165523760113. The reversal of 165523760077 is 770067325561.

It can be written as a sum of positive squares in 3 ways, for example, as 20651414436 + 144872345641 = 143706^2 + 380621^2 .

It is not a de Polignac number, because 165523760077 - 2⁷ = 165523759949 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 165523760077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165523761077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 489715098 + ... + 489715435.

It is an arithmetic number, because the mean of its divisors is an integer number (29872631287).

Almost surely, 2^165523760077 is an apocalyptic number.

It is an amenable number.

165523760077 is a deficient number, since it is larger than the sum of its proper divisors (13712027645).

165523760077 is an equidigital number, since it uses as much as digits as its factorization.

165523760077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979430559 (or 979430546 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 165523760077 in words is "one hundred sixty-five billion, five hundred twenty-three million, seven hundred sixty thousand, seventy-seven".