26668066064 has 20 divisors (see below), whose sum is σ = 51683423820. Its totient is φ = 13330408320.

The previous prime is 26668066063. The next prime is 26668066081. The reversal of 26668066064 is 46066086662.

It can be written as a sum of positive squares in 2 ways, for example, as 5491995664 + 21176070400 = 74108^2 + 145520^2 .

It is a super-2 number, since 2×26668066064² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (26668066063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165347 + ... + 284034.

It is an arithmetic number, because the mean of its divisors is an integer number (2584171191).

Almost surely, 2^26668066064 is an apocalyptic number.

It is an amenable number.

26668066064 is a deficient number, since it is larger than the sum of its proper divisors (25015357756).

26668066064 is a wasteful number, since it uses less digits than its factorization.

26668066064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453098 (or 453092 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 50.

The spelling of 26668066064 in words is "twenty-six billion, six hundred sixty-eight million, sixty-six thousand, sixty-four".