670506757 has 2 divisors, whose sum is σ = 670506758. Its totient is φ = 670506756.

The previous prime is 670506703. The next prime is 670506769. The reversal of 670506757 is 757605076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508682916 + 161823841 = 22554^2 + 12721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670506757 is a prime.

It is a super-2 number, since 2×670506757² = 899158622365314098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670501757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335253378 + 335253379.

It is an arithmetic number, because the mean of its divisors is an integer number (335253379).

Almost surely, 2^670506757 is an apocalyptic number.

It is an amenable number.

670506757 is a deficient number, since it is larger than the sum of its proper divisors (1).

670506757 is an equidigital number, since it uses as much as digits as its factorization.

670506757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 308700, while the sum is 43.

The square root of 670506757 is about 25894.1452262862. The cubic root of 670506757 is about 875.2545684333.

The spelling of 670506757 in words is "six hundred seventy million, five hundred six thousand, seven hundred fifty-seven".