25666610455 has 16 divisors (see below), whose sum is σ = 34029595584. Its totient is φ = 18485209600.

The previous prime is 25666610443. The next prime is 25666610461. The reversal of 25666610455 is 55401666652.

It is not a de Polignac number, because 25666610455 - 2²⁹ = 25129739543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6562396 + ... + 6566305.

It is an arithmetic number, because the mean of its divisors is an integer number (2126849724).

Almost surely, 2^25666610455 is an apocalyptic number.

25666610455 is a deficient number, since it is larger than the sum of its proper divisors (8362985129).

25666610455 is a wasteful number, since it uses less digits than its factorization.

25666610455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128746.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 25666610455 in words is "twenty-five billion, six hundred sixty-six million, six hundred ten thousand, four hundred fifty-five".