66262172260 has 24 divisors (see below), whose sum is σ = 139849819200. Its totient is φ = 26371677024.

The previous prime is 66262172243. The next prime is 66262172261. The reversal of 66262172260 is 6227126266.

It is a super-2 number, since 2×66262172260² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66262172261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8320414 + ... + 8328373.

It is an arithmetic number, because the mean of its divisors is an integer number (5827075800).

Almost surely, 2^66262172260 is an apocalyptic number.

It is an amenable number.

66262172260 is an abundant number, since it is smaller than the sum of its proper divisors (73587646940).

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

66262172260 is a wasteful number, since it uses less digits than its factorization.

66262172260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16648995 (or 16648993 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 66262172260 in words is "sixty-six billion, two hundred sixty-two million, one hundred seventy-two thousand, two hundred sixty".