2506664253668 has 24 divisors (see below), whose sum is σ = 4469738914872. Its totient is φ = 1229599265024.

The previous prime is 2506664253631. The next prime is 2506664253677. The reversal of 2506664253668 is 8663524666052.

It can be written as a sum of positive squares in 4 ways, for example, as 565552129024 + 1941112124644 = 752032^2 + 1393238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2718296 + ... + 3521712.

It is an arithmetic number, because the mean of its divisors is an integer number (186239121453).

Almost surely, 2^{2506664253668} is an apocalyptic number.

It is an amenable number.

2506664253668 is a deficient number, since it is larger than the sum of its proper divisors (1963074661204).

2506664253668 is a wasteful number, since it uses less digits than its factorization.

2506664253668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818191 (or 818189 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 59.

The spelling of 2506664253668 in words is "two trillion, five hundred six billion, six hundred sixty-four million, two hundred fifty-three thousand, six hundred sixty-eight".