2507604661 has 2 divisors, whose sum is σ = 2507604662. Its totient is φ = 2507604660.

The previous prime is 2507604581. The next prime is 2507604679. The reversal of 2507604661 is 1664067052.

It is a happy number.

2507604661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1986395761 + 521208900 = 44569^2 + 22830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2507604661 - 2¹¹ = 2507602613 is a prime.

It is a super-2 number, since 2×2507604661² = 12576162271737849842, 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 2507604661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2507604061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253802330 + 1253802331.

It is an arithmetic number, because the mean of its divisors is an integer number (1253802331).

Almost surely, 2^2507604661 is an apocalyptic number.

It is an amenable number.

2507604661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2507604661 is an equidigital number, since it uses as much as digits as its factorization.

2507604661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 2507604661 is about 50075.9888669210. The cubic root of 2507604661 is about 1358.5835636842.

The spelling of 2507604661 in words is "two billion, five hundred seven million, six hundred four thousand, six hundred sixty-one".