26661651670 has 16 divisors (see below), whose sum is σ = 48202391088. Its totient is φ = 10617678880.

The previous prime is 26661651647. The next prime is 26661651721. The reversal of 26661651670 is 7615616662.

It is a self number, because there is not a number n which added to its sum of digits gives 26661651670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5870341 + ... + 5874880.

It is an arithmetic number, because the mean of its divisors is an integer number (3012649443).

Almost surely, 2^26661651670 is an apocalyptic number.

26661651670 is a deficient number, since it is larger than the sum of its proper divisors (21540739418).

26661651670 is a wasteful number, since it uses less digits than its factorization.

26661651670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11745455.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 26661651670 in words is "twenty-six billion, six hundred sixty-one million, six hundred fifty-one thousand, six hundred seventy".