766511401 has 2 divisors, whose sum is σ = 766511402. Its totient is φ = 766511400.

The previous prime is 766511381. The next prime is 766511489. The reversal of 766511401 is 104115667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473280025 + 293231376 = 21755^2 + 17124^2 .

It is a cyclic number.

It is not a de Polignac number, because 766511401 - 2²¹ = 764414249 is a prime.

It is not a weakly prime, because it can be changed into another prime (766511491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383255700 + 383255701.

It is an arithmetic number, because the mean of its divisors is an integer number (383255701).

Almost surely, 2^766511401 is an apocalyptic number.

It is an amenable number.

766511401 is a deficient number, since it is larger than the sum of its proper divisors (1).

766511401 is an equidigital number, since it uses as much as digits as its factorization.

766511401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 766511401 is about 27685.9422992969. The cubic root of 766511401 is about 915.1793375774.

The spelling of 766511401 in words is "seven hundred sixty-six million, five hundred eleven thousand, four hundred one".