2666604663 has 24 divisors (see below), whose sum is σ = 3908682960. Its totient is φ = 1751518080.

The previous prime is 2666604653. The next prime is 2666604719. The reversal of 2666604663 is 3664066662.

It is not a de Polignac number, because 2666604663 - 2⁶ = 2666604599 is a prime.

It is a super-2 number, since 2×2666604663² = 14221560857466687138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666604653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 905848 + ... + 908786.

It is an arithmetic number, because the mean of its divisors is an integer number (162861790).

Almost surely, 2^2666604663 is an apocalyptic number.

2666604663 is a deficient number, since it is larger than the sum of its proper divisors (1242078297).

2666604663 is a wasteful number, since it uses less digits than its factorization.

2666604663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399 (or 4396 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

The square root of 2666604663 is about 51639.1775980214. The cubic root of 2666604663 is about 1386.7118008826.

The spelling of 2666604663 in words is "two billion, six hundred sixty-six million, six hundred four thousand, six hundred sixty-three".