26420516660 has 24 divisors (see below), whose sum is σ = 56773391136. Its totient is φ = 10322434080.

The previous prime is 26420516651. The next prime is 26420516687. The reversal of 26420516660 is 6661502462.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15359906 + ... + 15361625.

It is an arithmetic number, because the mean of its divisors is an integer number (2365557964).

Almost surely, 2^26420516660 is an apocalyptic number.

26420516660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26420516660 is an abundant number, since it is smaller than the sum of its proper divisors (30352874476).

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

26420516660 is a wasteful number, since it uses less digits than its factorization.

26420516660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30721583 (or 30721581 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 26420516660 in words is "twenty-six billion, four hundred twenty million, five hundred sixteen thousand, six hundred sixty".