7666520253 has 40 divisors (see below), whose sum is σ = 12059985600. Its totient is φ = 4331283264.

The previous prime is 7666520249. The next prime is 7666520263. The reversal of 7666520253 is 3520256667.

It is not a de Polignac number, because 7666520253 - 2² = 7666520249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666520203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 635088 + ... + 647046.

It is an arithmetic number, because the mean of its divisors is an integer number (301499640).

Almost surely, 2^7666520253 is an apocalyptic number.

It is an amenable number.

7666520253 is a deficient number, since it is larger than the sum of its proper divisors (4393465347).

7666520253 is an equidigital number, since it uses as much as digits as its factorization.

7666520253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12079 (or 12058 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 7666520253 is about 87558.6674921449. The cubic root of 7666520253 is about 1971.8146808730.

The spelling of 7666520253 in words is "seven billion, six hundred sixty-six million, five hundred twenty thousand, two hundred fifty-three".