670720920 has 64 divisors (see below), whose sum is σ = 2042219520. Its totient is φ = 176187264.

The previous prime is 670720877. The next prime is 670720951. The reversal of 670720920 is 29027076.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 33672 + ... + 49751.

It is an arithmetic number, because the mean of its divisors is an integer number (31909680).

Almost surely, 2^670720920 is an apocalyptic number.

670720920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

670720920 is an abundant number, since it is smaller than the sum of its proper divisors (1371498600).

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

670720920 is a wasteful number, since it uses less digits than its factorization.

670720920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83504 (or 83500 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 670720920 is about 25898.2802517851. The cubic root of 670720920 is about 875.3477453170.

Adding to 670720920 its reverse (29027076), we get a palindrome (699747996).

The spelling of 670720920 in words is "six hundred seventy million, seven hundred twenty thousand, nine hundred twenty".