26661723219 has 12 divisors (see below), whose sum is σ = 38529080200. Its totient is φ = 17766311904.

The previous prime is 26661723217. The next prime is 26661723227. The reversal of 26661723219 is 91232716662.

It is not a de Polignac number, because 26661723219 - 2¹ = 26661723217 is a prime.

It is a super-2 number, since 2×26661723219² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26661723217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660154 + ... + 699375.

Almost surely, 2^26661723219 is an apocalyptic number.

26661723219 is a deficient number, since it is larger than the sum of its proper divisors (11867356981).

26661723219 is a wasteful number, since it uses less digits than its factorization.

26661723219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361714 (or 1361711 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 26661723219 in words is "twenty-six billion, six hundred sixty-one million, seven hundred twenty-three thousand, two hundred nineteen".