26665611345 has 32 divisors (see below), whose sum is σ = 47412368640. Its totient is φ = 14219608320.

The previous prime is 26665611337. The next prime is 26665611367. The reversal of 26665611345 is 54311656662.

It is not a de Polignac number, because 26665611345 - 2³ = 26665611337 is a prime.

It is a super-2 number, since 2×26665611345² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 26665611345.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1601865 + ... + 1618425.

It is an arithmetic number, because the mean of its divisors is an integer number (1481636520).

Almost surely, 2^26665611345 is an apocalyptic number.

It is an amenable number.

26665611345 is a deficient number, since it is larger than the sum of its proper divisors (20746757295).

26665611345 is a wasteful number, since it uses less digits than its factorization.

26665611345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28502 (or 28496 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 26665611345 in words is "twenty-six billion, six hundred sixty-five million, six hundred eleven thousand, three hundred forty-five".