7479665257 has 8 divisors (see below), whose sum is σ = 7531420032. Its totient is φ = 7427940000.

The previous prime is 7479665231. The next prime is 7479665269. The reversal of 7479665257 is 7525669747.

7479665257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7479665257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7479665357) 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, 803373 + ... + 812629.

It is an arithmetic number, because the mean of its divisors is an integer number (941427504).

Almost surely, 2^7479665257 is an apocalyptic number.

It is an amenable number.

7479665257 is a deficient number, since it is larger than the sum of its proper divisors (51754775).

7479665257 is a wasteful number, since it uses less digits than its factorization.

7479665257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14759.

The product of its digits is 22226400, while the sum is 58.

The square root of 7479665257 is about 86485.0579984774. The cubic root of 7479665257 is about 1955.6631565221.

The spelling of 7479665257 in words is "seven billion, four hundred seventy-nine million, six hundred sixty-five thousand, two hundred fifty-seven".