6629501668 has 6 divisors (see below), whose sum is σ = 11601627926. Its totient is φ = 3314750832.

The previous prime is 6629501657. The next prime is 6629501689. The reversal of 6629501668 is 8661059266.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3614173924 + 3015327744 = 60118^2 + 54912^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828687705 + ... + 828687712.

Almost surely, 2^6629501668 is an apocalyptic number.

It is an amenable number.

6629501668 is a deficient number, since it is larger than the sum of its proper divisors (4972126258).

6629501668 is a wasteful number, since it uses less digits than its factorization.

6629501668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657375421 (or 1657375419 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 6629501668 is about 81421.7518111714. The cubic root of 6629501668 is about 1878.5681783137.

The spelling of 6629501668 in words is "six billion, six hundred twenty-nine million, five hundred one thousand, six hundred sixty-eight".