77765041 has 2 divisors, whose sum is σ = 77765042. Its totient is φ = 77765040.

The previous prime is 77765033. The next prime is 77765111. The reversal of 77765041 is 14056777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43296400 + 34468641 = 6580^2 + 5871^2 .

It is a cyclic number.

It is not a de Polignac number, because 77765041 - 2³ = 77765033 is a prime.

It is not a weakly prime, because it can be changed into another prime (77765011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38882520 + 38882521.

It is an arithmetic number, because the mean of its divisors is an integer number (38882521).

Almost surely, 2^77765041 is an apocalyptic number.

It is an amenable number.

77765041 is a deficient number, since it is larger than the sum of its proper divisors (1).

77765041 is an equidigital number, since it uses as much as digits as its factorization.

77765041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 77765041 is about 8818.4488998916. The cubic root of 77765041 is about 426.8364197444.

The spelling of 77765041 in words is "seventy-seven million, seven hundred sixty-five thousand, forty-one".