7664268481 has 2 divisors, whose sum is σ = 7664268482. Its totient is φ = 7664268480.

The previous prime is 7664268473. The next prime is 7664268499. The reversal of 7664268481 is 1848624667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7570566081 + 93702400 = 87009^2 + 9680^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664268481 - 2³ = 7664268473 is a prime.

It is a super-2 number, since 2×7664268481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7664268421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832134240 + 3832134241.

It is an arithmetic number, because the mean of its divisors is an integer number (3832134241).

Almost surely, 2^7664268481 is an apocalyptic number.

It is an amenable number.

7664268481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664268481 is an equidigital number, since it uses as much as digits as its factorization.

7664268481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 52.

The square root of 7664268481 is about 87545.8079007784. The cubic root of 7664268481 is about 1971.6216114526.

The spelling of 7664268481 in words is "seven billion, six hundred sixty-four million, two hundred sixty-eight thousand, four hundred eighty-one".