672612757 has 4 divisors (see below), whose sum is σ = 672691500. Its totient is φ = 672534016.

The previous prime is 672612737. The next prime is 672612761. The reversal of 672612757 is 757216276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93199716 + 579413041 = 9654^2 + 24071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672612757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672612737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24748 + ... + 44245.

It is an arithmetic number, because the mean of its divisors is an integer number (168172875).

Almost surely, 2^672612757 is an apocalyptic number.

It is an amenable number.

672612757 is a deficient number, since it is larger than the sum of its proper divisors (78743).

672612757 is an equidigital number, since it uses as much as digits as its factorization.

672612757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78742.

The product of its digits is 246960, while the sum is 43.

The square root of 672612757 is about 25934.7789078681. The cubic root of 672612757 is about 876.1699753740.

The spelling of 672612757 in words is "six hundred seventy-two million, six hundred twelve thousand, seven hundred fifty-seven".