7431551668 has 24 divisors (see below), whose sum is σ = 13335055272. Its totient is φ = 3622429824.

The previous prime is 7431551653. The next prime is 7431551693. The reversal of 7431551668 is 8661551347.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1785231504 + 5646320164 = 42252^2 + 75142^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 78355 + ... + 144922.

It is an arithmetic number, because the mean of its divisors is an integer number (555627303).

Almost surely, 2^7431551668 is an apocalyptic number.

It is an amenable number.

7431551668 is a deficient number, since it is larger than the sum of its proper divisors (5903503604).

7431551668 is a wasteful number, since it uses less digits than its factorization.

7431551668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223491 (or 223489 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 7431551668 is about 86206.4479490949. The cubic root of 7431551668 is about 1951.4608092216.

The spelling of 7431551668 in words is "seven billion, four hundred thirty-one million, five hundred fifty-one thousand, six hundred sixty-eight".