671955670 has 16 divisors (see below), whose sum is σ = 1214585280. Its totient is φ = 267656704.

The previous prime is 671955667. The next prime is 671955671. The reversal of 671955670 is 76559176.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 671955670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671955671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138187 + ... + 142966.

It is an arithmetic number, because the mean of its divisors is an integer number (75911580).

Almost surely, 2^671955670 is an apocalyptic number.

671955670 is a deficient number, since it is larger than the sum of its proper divisors (542629610).

671955670 is a wasteful number, since it uses less digits than its factorization.

671955670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281399.

The product of its (nonzero) digits is 396900, while the sum is 46.

The square root of 671955670 is about 25922.1077460919. The cubic root of 671955670 is about 875.8845672283.

The spelling of 671955670 in words is "six hundred seventy-one million, nine hundred fifty-five thousand, six hundred seventy".