670676646 has 16 divisors (see below), whose sum is σ = 1341615024. Its totient is φ = 223515264.

The previous prime is 670676641. The next prime is 670676683. The reversal of 670676646 is 646676076.

It is a junction number, because it is equal to n+sod(n) for n = 670676595 and 670676604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670676641) 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 7 ways as a sum of consecutive naturals, for example, 42610 + ... + 56186.

It is an arithmetic number, because the mean of its divisors is an integer number (83850939).

Almost surely, 2^670676646 is an apocalyptic number.

670676646 is an abundant number, since it is smaller than the sum of its proper divisors (670938378).

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

670676646 is a wasteful number, since it uses less digits than its factorization.

670676646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21815.

The product of its (nonzero) digits is 1524096, while the sum is 48.

The square root of 670676646 is about 25897.4254704980. The cubic root of 670676646 is about 875.3284844503.

The spelling of 670676646 in words is "six hundred seventy million, six hundred seventy-six thousand, six hundred forty-six".