26401412566 has 4 divisors (see below), whose sum is σ = 39602118852. Its totient is φ = 13200706282.

The previous prime is 26401412549. The next prime is 26401412599. The reversal of 26401412566 is 66521410462.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600353140 + ... + 6600353143.

It is an arithmetic number, because the mean of its divisors is an integer number (9900529713).

Almost surely, 2^26401412566 is an apocalyptic number.

26401412566 is a deficient number, since it is larger than the sum of its proper divisors (13200706286).

26401412566 is a wasteful number, since it uses less digits than its factorization.

26401412566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13200706285.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 26401412566 in words is "twenty-six billion, four hundred one million, four hundred twelve thousand, five hundred sixty-six".