671355720 has 96 divisors (see below), whose sum is σ = 2493616320. Its totient is φ = 153452160.

The previous prime is 671355719. The next prime is 671355731. The reversal of 671355720 is 27553176.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130686 + ... + 135725.

It is an arithmetic number, because the mean of its divisors is an integer number (25975170).

Almost surely, 2^671355720 is an apocalyptic number.

671355720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671355720 is an abundant number, since it is smaller than the sum of its proper divisors (1822260600).

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

671355720 is a wasteful number, since it uses less digits than its factorization.

671355720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266435 (or 266428 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 671355720 is about 25910.5329933601. The cubic root of 671355720 is about 875.6238142057.

The spelling of 671355720 in words is "six hundred seventy-one million, three hundred fifty-five thousand, seven hundred twenty".