7525664665257 has 16 divisors (see below), whose sum is σ = 10094578365312. Its totient is φ = 4986932000640.

The previous prime is 7525664665249. The next prime is 7525664665273.

7525664665257 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7525664665257 - 2³ = 7525664665249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7525664665247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20366407 + ... + 20732627.

It is an arithmetic number, because the mean of its divisors is an integer number (630911147832).

Almost surely, 2^{7525664665257} is an apocalyptic number.

It is an amenable number.

7525664665257 is a deficient number, since it is larger than the sum of its proper divisors (2568913700055).

7525664665257 is a wasteful number, since it uses less digits than its factorization.

7525664665257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407408.

The product of its digits is 635040000, while the sum is 66.

The spelling of 7525664665257 in words is "seven trillion, five hundred twenty-five billion, six hundred sixty-four million, six hundred sixty-five thousand, two hundred fifty-seven".