6906947664 has 20 divisors (see below), whose sum is σ = 17842948256. Its totient is φ = 2302315872.

The previous prime is 6906947623. The next prime is 6906947683. The reversal of 6906947664 is 4667496096.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71947324 + ... + 71947419.

Almost surely, 2^6906947664 is an apocalyptic number.

It is an amenable number.

6906947664 is an abundant number, since it is smaller than the sum of its proper divisors (10936000592).

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

6906947664 is a wasteful number, since it uses less digits than its factorization.

6906947664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143894754 (or 143894748 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 57.

The square root of 6906947664 is about 83108.0481301300. The cubic root of 6906947664 is about 1904.4170240301.

The spelling of 6906947664 in words is "six billion, nine hundred six million, nine hundred forty-seven thousand, six hundred sixty-four".