671666292 has 36 divisors (see below), whose sum is σ = 1852171776. Its totient is φ = 203535120.

The previous prime is 671666279. The next prime is 671666299. The reversal of 671666292 is 292666176.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×671666292² = 902271215618058528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671666299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 847668 + ... + 848459.

It is an arithmetic number, because the mean of its divisors is an integer number (51449216).

Almost surely, 2^671666292 is an apocalyptic number.

It is an amenable number.

671666292 is an abundant number, since it is smaller than the sum of its proper divisors (1180505484).

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

671666292 is a wasteful number, since it uses less digits than its factorization.

671666292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696148 (or 1696143 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 671666292 is about 25916.5254615660. The cubic root of 671666292 is about 875.7588158190.

The spelling of 671666292 in words is "six hundred seventy-one million, six hundred sixty-six thousand, two hundred ninety-two".