77600641 has 2 divisors, whose sum is σ = 77600642. Its totient is φ = 77600640.

The previous prime is 77600609. The next prime is 77600687. The reversal of 77600641 is 14600677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76737600 + 863041 = 8760^2 + 929^2 .

It is a cyclic number.

It is not a de Polignac number, because 77600641 - 2⁵ = 77600609 is a prime.

It is a super-2 number, since 2×77600641² = 12043718967221762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77600141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38800320 + 38800321.

It is an arithmetic number, because the mean of its divisors is an integer number (38800321).

Almost surely, 2^77600641 is an apocalyptic number.

It is an amenable number.

77600641 is a deficient number, since it is larger than the sum of its proper divisors (1).

77600641 is an equidigital number, since it uses as much as digits as its factorization.

77600641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 77600641 is about 8809.1226010313. The cubic root of 77600641 is about 426.5354215329.

The spelling of 77600641 in words is "seventy-seven million, six hundred thousand, six hundred forty-one".