7664376440 has 32 divisors (see below), whose sum is σ = 19708397280. Its totient is φ = 2627786112.

The previous prime is 7664376413. The next prime is 7664376443. The reversal of 7664376440 is 446734667.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664376443) 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, 13686107 + ... + 13686666.

It is an arithmetic number, because the mean of its divisors is an integer number (615887415).

Almost surely, 2^7664376440 is an apocalyptic number.

7664376440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7664376440 is an abundant number, since it is smaller than the sum of its proper divisors (12044020840).

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

7664376440 is a wasteful number, since it uses less digits than its factorization.

7664376440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27372791 (or 27372787 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 47.

The square root of 7664376440 is about 87546.4244843843. The cubic root of 7664376440 is about 1971.6308688396.

The spelling of 7664376440 in words is "seven billion, six hundred sixty-four million, three hundred seventy-six thousand, four hundred forty".