76601561 has 2 divisors, whose sum is σ = 76601562. Its totient is φ = 76601560.

The previous prime is 76601537. The next prime is 76601563. The reversal of 76601561 is 16510667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 22505536 = 7355^2 + 4744^2 .

It is a cyclic number.

It is not a de Polignac number, because 76601561 - 2²⁶ = 9492697 is a prime.

Together with 76601563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76601563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38300780 + 38300781.

It is an arithmetic number, because the mean of its divisors is an integer number (38300781).

Almost surely, 2^76601561 is an apocalyptic number.

It is an amenable number.

76601561 is a deficient number, since it is larger than the sum of its proper divisors (1).

76601561 is an equidigital number, since it uses as much as digits as its factorization.

76601561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 76601561 is about 8752.2317725252. The cubic root of 76601561 is about 424.6970131146.

The spelling of 76601561 in words is "seventy-six million, six hundred one thousand, five hundred sixty-one".