670627657 has 4 divisors (see below), whose sum is σ = 766431616. Its totient is φ = 574823700.

The previous prime is 670627621. The next prime is 670627663. The reversal of 670627657 is 756726076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670627657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670627687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47901969 + ... + 47901982.

It is an arithmetic number, because the mean of its divisors is an integer number (191607904).

Almost surely, 2^670627657 is an apocalyptic number.

It is an amenable number.

670627657 is a deficient number, since it is larger than the sum of its proper divisors (95803959).

670627657 is an equidigital number, since it uses as much as digits as its factorization.

670627657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95803958.

The product of its (nonzero) digits is 740880, while the sum is 46.

The square root of 670627657 is about 25896.4796256171. The cubic root of 670627657 is about 875.3071713920.

The spelling of 670627657 in words is "six hundred seventy million, six hundred twenty-seven thousand, six hundred fifty-seven".