671215760 has 40 divisors (see below), whose sum is σ = 1652378616. Its totient is φ = 252692480.

The previous prime is 671215747. The next prime is 671215807. The reversal of 671215760 is 67512176.

It can be written as a sum of positive squares in 4 ways, for example, as 149915536 + 521300224 = 12244^2 + 22832^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 671215760.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245411 + ... + 248130.

Almost surely, 2^671215760 is an apocalyptic number.

It is an amenable number.

671215760 is an abundant number, since it is smaller than the sum of its proper divisors (981162856).

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

671215760 is a wasteful number, since it uses less digits than its factorization.

671215760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493571 (or 493565 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 671215760 is about 25907.8320204528. The cubic root of 671215760 is about 875.5629618028.

The spelling of 671215760 in words is "six hundred seventy-one million, two hundred fifteen thousand, seven hundred sixty".