6642266825 has 12 divisors (see below), whose sum is σ = 8459017740. Its totient is φ = 5170196160.

The previous prime is 6642266819. The next prime is 6642266831. The reversal of 6642266825 is 5286622466.

It is an interprime number because it is at equal distance from previous prime (6642266819) and next prime (6642266831).

It can be written as a sum of positive squares in 6 ways, for example, as 1157776 + 6641109049 = 1076^2 + 81493^2 .

It is not a de Polignac number, because 6642266825 - 2¹⁴ = 6642250441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6642266825.

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, 3589490 + ... + 3591339.

It is an arithmetic number, because the mean of its divisors is an integer number (704918145).

Almost surely, 2^6642266825 is an apocalyptic number.

It is an amenable number.

6642266825 is a deficient number, since it is larger than the sum of its proper divisors (1816750915).

6642266825 is a wasteful number, since it uses less digits than its factorization.

6642266825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180876 (or 7180871 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 47.

The square root of 6642266825 is about 81500.1032207935. The cubic root of 6642266825 is about 1879.7731378019.

The spelling of 6642266825 in words is "six billion, six hundred forty-two million, two hundred sixty-six thousand, eight hundred twenty-five".