671670357 has 16 divisors (see below), whose sum is σ = 989470080. Its totient is φ = 403116032.

The previous prime is 671670347. The next prime is 671670359. The reversal of 671670357 is 753076176.

It is not a de Polignac number, because 671670357 - 2⁴ = 671670341 is a prime.

It is a super-2 number, since 2×671670357² = 902282136945014898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671670359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285132 + ... + 287477.

It is an arithmetic number, because the mean of its divisors is an integer number (61841880).

Almost surely, 2^671670357 is an apocalyptic number.

It is an amenable number.

671670357 is a deficient number, since it is larger than the sum of its proper divisors (317799723).

671670357 is a wasteful number, since it uses less digits than its factorization.

671670357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572652.

The product of its (nonzero) digits is 185220, while the sum is 42.

The square root of 671670357 is about 25916.6038863120. The cubic root of 671670357 is about 875.7605825457.

The spelling of 671670357 in words is "six hundred seventy-one million, six hundred seventy thousand, three hundred fifty-seven".