6671993904 has 30 divisors (see below), whose sum is σ = 18672316676. Its totient is φ = 2223997920.

The previous prime is 6671993903. The next prime is 6671993929. The reversal of 6671993904 is 4093991766.

6671993904 is a `hidden beast` number, since 6 + 67 + 199 + 390 + 4 = 666.

It is a super-2 number, since 2×6671993904² = 89031005310026322432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6671993903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23166502 + ... + 23166789.

Almost surely, 2^6671993904 is an apocalyptic number.

It is an amenable number.

6671993904 is an abundant number, since it is smaller than the sum of its proper divisors (12000322772).

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

6671993904 is a wasteful number, since it uses less digits than its factorization.

6671993904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46333305 (or 46333296 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 6671993904 is about 81682.2741113395. The cubic root of 6671993904 is about 1882.5732365174.

The spelling of 6671993904 in words is "six billion, six hundred seventy-one million, nine hundred ninety-three thousand, nine hundred four".