76561633 has 2 divisors, whose sum is σ = 76561634. Its totient is φ = 76561632.

The previous prime is 76561631. The next prime is 76561657. The reversal of 76561633 is 33616567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74943649 + 1617984 = 8657^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 76561633 - 2¹ = 76561631 is a prime.

Together with 76561631, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 76561592 and 76561601.

It is not a weakly prime, because it can be changed into another prime (76561631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38280816 + 38280817.

It is an arithmetic number, because the mean of its divisors is an integer number (38280817).

Almost surely, 2^76561633 is an apocalyptic number.

It is an amenable number.

76561633 is a deficient number, since it is larger than the sum of its proper divisors (1).

76561633 is an equidigital number, since it uses as much as digits as its factorization.

76561633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 37.

The square root of 76561633 is about 8749.9504570026. The cubic root of 76561633 is about 424.6232102257.

The spelling of 76561633 in words is "seventy-six million, five hundred sixty-one thousand, six hundred thirty-three".