671770944 has 252 divisors, whose sum is σ = 2136684576. Its totient is φ = 201636864.

The previous prime is 671770933. The next prime is 671770951. The reversal of 671770944 is 449077176.

It is a super-2 number, since 2×671770944² = 902552402405302272, 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 671770944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6521997 + ... + 6522099.

Almost surely, 2^671770944 is an apocalyptic number.

671770944 is a gapful number since it is divisible by the number (64) 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 671770944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1068342288).

671770944 is an abundant number, since it is smaller than the sum of its proper divisors (1464913632).

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

671770944 is a wasteful number, since it uses less digits than its factorization.

671770944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 671770944 is about 25918.5444035733. The cubic root of 671770944 is about 875.8042973094.

The spelling of 671770944 in words is "six hundred seventy-one million, seven hundred seventy thousand, nine hundred forty-four".