26064420660 has 72 divisors (see below), whose sum is σ = 79436893536. Its totient is φ = 6917561280.

The previous prime is 26064420611. The next prime is 26064420667. The reversal of 26064420660 is 6602446062.

26064420660 is a `hidden beast` number, since 2 + 6 + 0 + 644 + 2 + 0 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26064420667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305154 + ... + 381113.

It is an arithmetic number, because the mean of its divisors is an integer number (1103290188).

Almost surely, 2^26064420660 is an apocalyptic number.

26064420660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26064420660 is an abundant number, since it is smaller than the sum of its proper divisors (53372472876).

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

26064420660 is a wasteful number, since it uses less digits than its factorization.

26064420660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686493 (or 686488 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 26064420660 in words is "twenty-six billion, sixty-four million, four hundred twenty thousand, six hundred sixty".