26252051661 has 72 divisors (see below), whose sum is σ = 44037268704. Its totient is φ = 14942461440.

The previous prime is 26252051621. The next prime is 26252051701. The reversal of 26252051661 is 16615025262.

26252051661 is a `hidden beast` number, since 2 + 62 + 5 + 20 + 516 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (26252051621) and next prime (26252051701).

It is not a de Polignac number, because 26252051661 - 2⁷ = 26252051533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26252051621) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 22115710 + ... + 22116896.

It is an arithmetic number, because the mean of its divisors is an integer number (611628732).

Almost surely, 2^26252051661 is an apocalyptic number.

It is an amenable number.

26252051661 is a deficient number, since it is larger than the sum of its proper divisors (17785217043).

26252051661 is a wasteful number, since it uses less digits than its factorization.

26252051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 26252051661 in words is "twenty-six billion, two hundred fifty-two million, fifty-one thousand, six hundred sixty-one".