2508975661 has 8 divisors (see below), whose sum is σ = 2601807104. Its totient is φ = 2417461200.

The previous prime is 2508975641. The next prime is 2508975673. The reversal of 2508975661 is 1665798052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2508975661 - 2⁹ = 2508975149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2508975611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325365 + ... + 332986.

It is an arithmetic number, because the mean of its divisors is an integer number (325225888).

Almost surely, 2^2508975661 is an apocalyptic number.

It is an amenable number.

2508975661 is a deficient number, since it is larger than the sum of its proper divisors (92831443).

2508975661 is a wasteful number, since it uses less digits than its factorization.

2508975661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658491.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 2508975661 is about 50089.6761918062. The cubic root of 2508975661 is about 1358.8311144969.

The spelling of 2508975661 in words is "two billion, five hundred eight million, nine hundred seventy-five thousand, six hundred sixty-one".