7664440553 has 8 divisors (see below), whose sum is σ = 9555666240. Its totient is φ = 5972291280.

The previous prime is 7664440549. The next prime is 7664440573. The reversal of 7664440553 is 3550444667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7664440553 - 2² = 7664440549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664440573) 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, 49769018 + ... + 49769171.

It is an arithmetic number, because the mean of its divisors is an integer number (1194458280).

Almost surely, 2^7664440553 is an apocalyptic number.

It is an amenable number.

7664440553 is a deficient number, since it is larger than the sum of its proper divisors (1891225687).

7664440553 is a wasteful number, since it uses less digits than its factorization.

7664440553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99538207.

The product of its (nonzero) digits is 1209600, while the sum is 44.

The square root of 7664440553 is about 87546.7906493436. The cubic root of 7664440553 is about 1971.6363664305.

The spelling of 7664440553 in words is "seven billion, six hundred sixty-four million, four hundred forty thousand, five hundred fifty-three".