2506620657 has 8 divisors (see below), whose sum is σ = 3518064160. Its totient is φ = 1583128800.

The previous prime is 2506620647. The next prime is 2506620659. The reversal of 2506620657 is 7560266052.

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

It is not a de Polignac number, because 2506620657 - 2³⁰ = 1432878833 is a prime.

It is a super-2 number, since 2×2506620657² = 12566294236198223298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2506620659) 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, 21987844 + ... + 21987957.

It is an arithmetic number, because the mean of its divisors is an integer number (439758020).

Almost surely, 2^2506620657 is an apocalyptic number.

It is an amenable number.

2506620657 is a deficient number, since it is larger than the sum of its proper divisors (1011443503).

2506620657 is a wasteful number, since it uses less digits than its factorization.

2506620657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43975823.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 2506620657 is about 50066.1627948458. The cubic root of 2506620657 is about 1358.4058341051.

The spelling of 2506620657 in words is "two billion, five hundred six million, six hundred twenty thousand, six hundred fifty-seven".