666642848 has 24 divisors (see below), whose sum is σ = 1354792320. Its totient is φ = 322568640.

The previous prime is 666642839. The next prime is 666642857. The reversal of 666642848 is 848246666.

It is an interprime number because it is at equal distance from previous prime (666642839) and next prime (666642857).

It is a super-2 number, since 2×666642848² = 888825373579102208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666642796 and 666642805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335018 + ... + 337001.

It is an arithmetic number, because the mean of its divisors is an integer number (56449680).

Almost surely, 2^666642848 is an apocalyptic number.

It is an amenable number.

666642848 is an abundant number, since it is smaller than the sum of its proper divisors (688149472).

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

666642848 is a wasteful number, since it uses less digits than its factorization.

666642848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672060 (or 672052 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 50.

The square root of 666642848 is about 25819.4277240995. The cubic root of 666642848 is about 873.5700608514.

The spelling of 666642848 in words is "six hundred sixty-six million, six hundred forty-two thousand, eight hundred forty-eight".