671575990 has 32 divisors (see below), whose sum is σ = 1282021344. Its totient is φ = 252418560.

The previous prime is 671575987. The next prime is 671575999. The reversal of 671575990 is 99575176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671575999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114612 + ... + 120328.

It is an arithmetic number, because the mean of its divisors is an integer number (40063167).

Almost surely, 2^671575990 is an apocalyptic number.

671575990 is a deficient number, since it is larger than the sum of its proper divisors (610445354).

671575990 is a wasteful number, since it uses less digits than its factorization.

671575990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432.

The product of its (nonzero) digits is 595350, while the sum is 49.

The square root of 671575990 is about 25914.7832327419. The cubic root of 671575990 is about 875.7195670046.

The spelling of 671575990 in words is "six hundred seventy-one million, five hundred seventy-five thousand, nine hundred ninety".