66061023260 has 24 divisors (see below), whose sum is σ = 139059259920. Its totient is φ = 26361340544.

The previous prime is 66061023247. The next prime is 66061023283. The reversal of 66061023260 is 6232016066.

It is a super-2 number, since 2×66061023260² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3933209 + ... + 3949968.

It is an arithmetic number, because the mean of its divisors is an integer number (5794135830).

Almost surely, 2^66061023260 is an apocalyptic number.

It is an amenable number.

66061023260 is an abundant number, since it is smaller than the sum of its proper divisors (72998236660).

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

66061023260 is a wasteful number, since it uses less digits than its factorization.

66061023260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883605 (or 7883603 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 66061023260 in words is "sixty-six billion, sixty-one million, twenty-three thousand, two hundred sixty".