1979666408 has 16 divisors (see below), whose sum is σ = 3712450560. Its totient is φ = 989679600.

The previous prime is 1979666383. The next prime is 1979666443. The reversal of 1979666408 is 8046669791.

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, 50423 + ... + 80633.

It is an arithmetic number, because the mean of its divisors is an integer number (232028160).

Almost surely, 2^1979666408 is an apocalyptic number.

It is an amenable number.

1979666408 is a deficient number, since it is larger than the sum of its proper divisors (1732784152).

1979666408 is a wasteful number, since it uses less digits than its factorization.

1979666408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38408 (or 38404 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 1979666408 is about 44493.4423033327. The cubic root of 1979666408 is about 1255.6367108265.

The spelling of 1979666408 in words is "one billion, nine hundred seventy-nine million, six hundred sixty-six thousand, four hundred eight".