2666623617 has 12 divisors (see below), whose sum is σ = 4402045440. Its totient is φ = 1523784888.

The previous prime is 2666623577. The next prime is 2666623693. The reversal of 2666623617 is 7163266662.

2666623617 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2666623617 - 2⁷ = 2666623489 is a prime.

It is a super-2 number, since 2×2666623617² = 14221763029484325378, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2666627617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21163617 + ... + 21163742.

It is an arithmetic number, because the mean of its divisors is an integer number (366837120).

Almost surely, 2^2666623617 is an apocalyptic number.

It is an amenable number.

2666623617 is a deficient number, since it is larger than the sum of its proper divisors (1735421823).

2666623617 is a wasteful number, since it uses less digits than its factorization.

2666623617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42327372 (or 42327369 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 2666623617 is about 51639.3611211448. The cubic root of 2666623617 is about 1386.7150864182.

The spelling of 2666623617 in words is "two billion, six hundred sixty-six million, six hundred twenty-three thousand, six hundred seventeen".