7725631663 has 4 divisors (see below), whose sum is σ = 7726746888. Its totient is φ = 7724516440.

The previous prime is 7725631637. The next prime is 7725631729. The reversal of 7725631663 is 3661365277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3661365277 = 3449 ⋅1061573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7725631663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725635663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547156 + ... + 561097.

It is an arithmetic number, because the mean of its divisors is an integer number (1931686722).

Almost surely, 2^7725631663 is an apocalyptic number.

7725631663 is a deficient number, since it is larger than the sum of its proper divisors (1115225).

7725631663 is a wasteful number, since it uses less digits than its factorization.

7725631663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115224.

The product of its digits is 952560, while the sum is 46.

The square root of 7725631663 is about 87895.5724880383. The cubic root of 7725631663 is about 1976.8694930143.

The spelling of 7725631663 in words is "seven billion, seven hundred twenty-five million, six hundred thirty-one thousand, six hundred sixty-three".