77626642 has 8 divisors (see below), whose sum is σ = 116631756. Its totient is φ = 38749392.

The previous prime is 77626603. The next prime is 77626691. The reversal of 77626642 is 24662677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50680161 + 26946481 = 7119^2 + 5191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77626595 and 77626604.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 30433 + ... + 32884.

Almost surely, 2^77626642 is an apocalyptic number.

77626642 is a deficient number, since it is larger than the sum of its proper divisors (39005114).

77626642 is a wasteful number, since it uses less digits than its factorization.

77626642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63932.

The product of its digits is 169344, while the sum is 40.

The square root of 77626642 is about 8810.5982770752. The cubic root of 77626642 is about 426.5830547695.

The spelling of 77626642 in words is "seventy-seven million, six hundred twenty-six thousand, six hundred forty-two".