7643166725 has 12 divisors (see below), whose sum is σ = 9479097540. Its totient is φ = 6113520000.

The previous prime is 7643166691. The next prime is 7643166733. The reversal of 7643166725 is 5276613467.

It can be written as a sum of positive squares in 6 ways, for example, as 355812769 + 7287353956 = 18863^2 + 85366^2 .

It is not a de Polignac number, because 7643166725 - 2²⁴ = 7626389509 is a prime.

It is a super-2 number, since 2×7643166725² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7643166725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153191 + ... + 196859.

It is an arithmetic number, because the mean of its divisors is an integer number (789924795).

Almost surely, 2^7643166725 is an apocalyptic number.

It is an amenable number.

7643166725 is a deficient number, since it is larger than the sum of its proper divisors (1835930815).

7643166725 is a wasteful number, since it uses less digits than its factorization.

7643166725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50680 (or 50675 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The square root of 7643166725 is about 87425.2064624385. The cubic root of 7643166725 is about 1969.8104831989.

The spelling of 7643166725 in words is "seven billion, six hundred forty-three million, one hundred sixty-six thousand, seven hundred twenty-five".