672626557 has 2 divisors, whose sum is σ = 672626558. Its totient is φ = 672626556.

The previous prime is 672626533. The next prime is 672626611. The reversal of 672626557 is 755626276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441252036 + 231374521 = 21006^2 + 15211^2 .

It is a cyclic number.

It is not a de Polignac number, because 672626557 - 2¹⁹ = 672102269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672626527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336313278 + 336313279.

It is an arithmetic number, because the mean of its divisors is an integer number (336313279).

Almost surely, 2^672626557 is an apocalyptic number.

It is an amenable number.

672626557 is a deficient number, since it is larger than the sum of its proper divisors (1).

672626557 is an equidigital number, since it uses as much as digits as its factorization.

672626557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 46.

The square root of 672626557 is about 25935.0449585113. The cubic root of 672626557 is about 876.1759674613.

The spelling of 672626557 in words is "six hundred seventy-two million, six hundred twenty-six thousand, five hundred fifty-seven".