66564264140 has 24 divisors (see below), whose sum is σ = 152492678352. Its totient is φ = 24205186880.

The previous prime is 66564264139. The next prime is 66564264187. The reversal of 66564264140 is 4146246566.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 66564264091 and 66564264100.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151282199 + ... + 151282638.

It is an arithmetic number, because the mean of its divisors is an integer number (6353861598).

Almost surely, 2^66564264140 is an apocalyptic number.

It is an amenable number.

66564264140 is an abundant number, since it is smaller than the sum of its proper divisors (85928414212).

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

66564264140 is a wasteful number, since it uses less digits than its factorization.

66564264140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302564857 (or 302564855 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 66564264140 in words is "sixty-six billion, five hundred sixty-four million, two hundred sixty-four thousand, one hundred forty".