26610065664 has 144 divisors (see below), whose sum is σ = 87165251712. Its totient is φ = 7018020864.

The previous prime is 26610065621. The next prime is 26610065681. The reversal of 26610065664 is 46656001662.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120489 + ... + 260264.

It is an arithmetic number, because the mean of its divisors is an integer number (605314248).

Almost surely, 2^26610065664 is an apocalyptic number.

26610065664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26610065664 is an abundant number, since it is smaller than the sum of its proper divisors (60555186048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26610065664 is a wasteful number, since it uses less digits than its factorization.

26610065664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380792 (or 380778 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 26610065664 in words is "twenty-six billion, six hundred ten million, sixty-five thousand, six hundred sixty-four".