626661057 has 12 divisors (see below), whose sum is σ = 918412880. Its totient is φ = 379794360.

The previous prime is 626660989. The next prime is 626661073. The reversal of 626661057 is 750166626.

It is not a de Polignac number, because 626661057 - 2¹⁹ = 626136769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (626661457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 862807 + ... + 863532.

Almost surely, 2^626661057 is an apocalyptic number.

It is an amenable number.

626661057 is a deficient number, since it is larger than the sum of its proper divisors (291751823).

626661057 is a wasteful number, since it uses less digits than its factorization.

626661057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726364 (or 1726353 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 626661057 is about 25033.1990964000. The cubic root of 626661057 is about 855.7447346587.

The spelling of 626661057 in words is "six hundred twenty-six million, six hundred sixty-one thousand, fifty-seven".