7649331668 has 24 divisors (see below), whose sum is σ = 14745057600. Its totient is φ = 3443209920.

The previous prime is 7649331661. The next prime is 7649331673. The reversal of 7649331668 is 8661339467.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7649331661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839393 + ... + 848456.

It is an arithmetic number, because the mean of its divisors is an integer number (614377400).

Almost surely, 2^7649331668 is an apocalyptic number.

It is an amenable number.

7649331668 is a deficient number, since it is larger than the sum of its proper divisors (7095725932).

7649331668 is a wasteful number, since it uses less digits than its factorization.

7649331668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687967 (or 1687965 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 53.

The square root of 7649331668 is about 87460.4577394836. The cubic root of 7649331668 is about 1970.3399542158.

The spelling of 7649331668 in words is "seven billion, six hundred forty-nine million, three hundred thirty-one thousand, six hundred sixty-eight".