2506669566 has 16 divisors (see below), whose sum is σ = 5049408000. Its totient is φ = 829545048.

The previous prime is 2506669541. The next prime is 2506669631. The reversal of 2506669566 is 6659666052.

It is a super-2 number, since 2×2506669566² = 12566784626221256712, which contains 22 as substring.

It is a congruent number.

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, 1501966 + ... + 1503633.

It is an arithmetic number, because the mean of its divisors is an integer number (315588000).

Almost surely, 2^2506669566 is an apocalyptic number.

2506669566 is an abundant number, since it is smaller than the sum of its proper divisors (2542738434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2506669566 is a wasteful number, since it uses less digits than its factorization.

2506669566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005743.

The product of its (nonzero) digits is 3499200, while the sum is 51.

The square root of 2506669566 is about 50066.6512361272. The cubic root of 2506669566 is about 1358.4146690863.

The spelling of 2506669566 in words is "two billion, five hundred six million, six hundred sixty-nine thousand, five hundred sixty-six".