670865994 has 12 divisors (see below), whose sum is σ = 1453543026. Its totient is φ = 223621992.

The previous prime is 670865989. The next prime is 670865999. The reversal of 670865994 is 499568076.

It is an interprime number because it is at equal distance from previous prime (670865989) and next prime (670865999).

It can be written as a sum of positive squares in only one way, i.e., 568107225 + 102758769 = 23835^2 + 10137^2 .

It is a super-2 number, since 2×670865994² = 900122363811216072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 670865994.

It is not an unprimeable number, because it can be changed into a prime (670865999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18635149 + ... + 18635184.

Almost surely, 2^670865994 is an apocalyptic number.

670865994 is an abundant number, since it is smaller than the sum of its proper divisors (782677032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670865994 is a wasteful number, since it uses less digits than its factorization.

670865994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37270341 (or 37270338 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 670865994 is about 25901.0809426943. The cubic root of 670865994 is about 875.4108520630.

The spelling of 670865994 in words is "six hundred seventy million, eight hundred sixty-five thousand, nine hundred ninety-four".