667880871 has 8 divisors (see below), whose sum is σ = 1017723264. Its totient is φ = 381646200.

The previous prime is 667880867. The next prime is 667880881. The reversal of 667880871 is 178088766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667880871 - 2² = 667880867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667880881) 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, 15901905 + ... + 15901946.

It is an arithmetic number, because the mean of its divisors is an integer number (127215408).

Almost surely, 2^667880871 is an apocalyptic number.

667880871 is a deficient number, since it is larger than the sum of its proper divisors (349842393).

667880871 is a wasteful number, since it uses less digits than its factorization.

667880871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31803861.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 667880871 is about 25843.3912441847. The cubic root of 667880871 is about 874.1104956764.

The spelling of 667880871 in words is "six hundred sixty-seven million, eight hundred eighty thousand, eight hundred seventy-one".