26212566660 has 72 divisors (see below), whose sum is σ = 85378083840. Its totient is φ = 5991443136.

The previous prime is 26212566647. The next prime is 26212566671. The reversal of 26212566660 is 6666521262.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4454980 + ... + 4460859.

It is an arithmetic number, because the mean of its divisors is an integer number (1185806720).

Almost surely, 2^26212566660 is an apocalyptic number.

26212566660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26212566660 is an abundant number, since it is smaller than the sum of its proper divisors (59165517180).

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

26212566660 is a wasteful number, since it uses less digits than its factorization.

26212566660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915865 (or 8915856 counting only the distinct ones).

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

The spelling of 26212566660 in words is "twenty-six billion, two hundred twelve million, five hundred sixty-six thousand, six hundred sixty".