670532857 has 4 divisors (see below), whose sum is σ = 705824080. Its totient is φ = 635241636.

The previous prime is 670532831. The next prime is 670532873. The reversal of 670532857 is 758235076.

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-670532857 is a prime.

It is a super-2 number, since 2×670532857² = 899228624633164898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670536857) 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, 17645583 + ... + 17645620.

It is an arithmetic number, because the mean of its divisors is an integer number (176456020).

Almost surely, 2^670532857 is an apocalyptic number.

It is an amenable number.

670532857 is a deficient number, since it is larger than the sum of its proper divisors (35291223).

670532857 is a wasteful number, since it uses less digits than its factorization.

670532857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35291222.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 670532857 is about 25894.6491963108. The cubic root of 670532857 is about 875.2659249421.

The spelling of 670532857 in words is "six hundred seventy million, five hundred thirty-two thousand, eight hundred fifty-seven".