670517880 has 64 divisors (see below), whose sum is σ = 2025108000. Its totient is φ = 177600000.

The previous prime is 670517849. The next prime is 670517899. The reversal of 670517880 is 88715076.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871 + ... + 36630.

Almost surely, 2^670517880 is an apocalyptic number.

670517880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670517880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012554000).

670517880 is an abundant number, since it is smaller than the sum of its proper divisors (1354590120).

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

670517880 is a wasteful number, since it uses less digits than its factorization.

670517880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37664 (or 37660 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 670517880 is about 25894.3600036765. The cubic root of 670517880 is about 875.2594082566.

The spelling of 670517880 in words is "six hundred seventy million, five hundred seventeen thousand, eight hundred eighty".