2501667664 has 20 divisors (see below), whose sum is σ = 4848127200. Its totient is φ = 1250538080.

The previous prime is 2501667659. The next prime is 2501667689. The reversal of 2501667664 is 4667661052.

It is a happy number.

It is a super-2 number, since 2×2501667664² = 12516682202206433792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2501667664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61887 + ... + 93985.

It is an arithmetic number, because the mean of its divisors is an integer number (242406360).

Almost surely, 2^2501667664 is an apocalyptic number.

It is an amenable number.

2501667664 is a deficient number, since it is larger than the sum of its proper divisors (2346459536).

2501667664 is a wasteful number, since it uses less digits than its factorization.

2501667664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36978 (or 36972 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 2501667664 is about 50016.6738598240. The cubic root of 2501667664 is about 1357.5105236554.

The spelling of 2501667664 in words is "two billion, five hundred one million, six hundred sixty-seven thousand, six hundred sixty-four".