766591601 has 2 divisors, whose sum is σ = 766591602. Its totient is φ = 766591600.

The previous prime is 766591577. The next prime is 766591607. The reversal of 766591601 is 106195667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602751601 + 163840000 = 24551^2 + 12800^2 .

It is a cyclic number.

It is not a de Polignac number, because 766591601 - 2²⁶ = 699482737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (766591607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383295800 + 383295801.

It is an arithmetic number, because the mean of its divisors is an integer number (383295801).

Almost surely, 2^766591601 is an apocalyptic number.

It is an amenable number.

766591601 is a deficient number, since it is larger than the sum of its proper divisors (1).

766591601 is an equidigital number, since it uses as much as digits as its factorization.

766591601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 766591601 is about 27687.3906498969. The cubic root of 766591601 is about 915.2112548339.

The spelling of 766591601 in words is "seven hundred sixty-six million, five hundred ninety-one thousand, six hundred one".