2666340654525 has 24 divisors (see below), whose sum is σ = 4898166536960. Its totient is φ = 1422048348720.

The previous prime is 2666340654511. The next prime is 2666340654547. The reversal of 2666340654525 is 5254560436662.

It is not a de Polignac number, because 2666340654525 - 2¹¹ = 2666340652477 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975066477 + ... + 1975067826.

Almost surely, 2^{2666340654525} is an apocalyptic number.

2666340654525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2666340654525 is a deficient number, since it is larger than the sum of its proper divisors (2231825882435).

2666340654525 is a wasteful number, since it uses less digits than its factorization.

2666340654525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950134322 (or 3950134311 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 54.

The spelling of 2666340654525 in words is "two trillion, six hundred sixty-six billion, three hundred forty million, six hundred fifty-four thousand, five hundred twenty-five".