2666694593 has 8 divisors (see below), whose sum is σ = 2820354720. Its totient is φ = 2514365280.

The previous prime is 2666694587. The next prime is 2666694661. The reversal of 2666694593 is 3954966662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666694593 is a prime.

It is a super-2 number, since 2×2666694593² = 14222520104670871298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666694193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328580 + ... + 336597.

It is an arithmetic number, because the mean of its divisors is an integer number (352544340).

Almost surely, 2^2666694593 is an apocalyptic number.

It is an amenable number.

2666694593 is a deficient number, since it is larger than the sum of its proper divisors (153660127).

2666694593 is a wasteful number, since it uses less digits than its factorization.

2666694593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665407.

The product of its digits is 12597120, while the sum is 56.

The square root of 2666694593 is about 51640.0483442841. The cubic root of 2666694593 is about 1386.7273894439.

The spelling of 2666694593 in words is "two billion, six hundred sixty-six million, six hundred ninety-four thousand, five hundred ninety-three".