6667995864 has 32 divisors (see below), whose sum is σ = 16741548720. Its totient is φ = 2213124096.

The previous prime is 6667995823. The next prime is 6667995877. The reversal of 6667995864 is 4685997666.

It is a super-2 number, since 2×6667995864² = 88924337684642212992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6667995795 and 6667995804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590617 + ... + 601800.

Almost surely, 2^6667995864 is an apocalyptic number.

It is an amenable number.

6667995864 is an abundant number, since it is smaller than the sum of its proper divisors (10073552856).

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

6667995864 is a wasteful number, since it uses less digits than its factorization.

6667995864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192659 (or 1192655 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 66.

The square root of 6667995864 is about 81657.7973251789. The cubic root of 6667995864 is about 1882.1971317080.

The spelling of 6667995864 in words is "six billion, six hundred sixty-seven million, nine hundred ninety-five thousand, eight hundred sixty-four".