667860992 has 30 divisors (see below), whose sum is σ = 1335713988. Its totient is φ = 333922304.

The previous prime is 667860971. The next prime is 667861021. The reversal of 667860992 is 299068766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998 + ... + 36765.

Almost surely, 2^667860992 is an apocalyptic number.

It is an amenable number.

667860992 is a deficient number, since it is larger than the sum of its proper divisors (667852996).

667860992 is an frugal number, since it uses more digits than its factorization.

667860992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40791 (or 40765 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 667860992 is about 25843.0066362256. The cubic root of 667860992 is about 874.1018231642.

The spelling of 667860992 in words is "six hundred sixty-seven million, eight hundred sixty thousand, nine hundred ninety-two".