66574220620 has 96 divisors (see below), whose sum is σ = 149125898880. Its totient is φ = 24917114880.

The previous prime is 66574220597. The next prime is 66574220633. The reversal of 66574220620 is 2602247566.

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 31 ways as a sum of consecutive naturals, for example, 5509185 + ... + 5521255.

It is an arithmetic number, because the mean of its divisors is an integer number (1553394780).

Almost surely, 2^66574220620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66574220620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74562949440).

66574220620 is an abundant number, since it is smaller than the sum of its proper divisors (82551678260).

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

66574220620 is a wasteful number, since it uses less digits than its factorization.

66574220620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12403 (or 12401 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 66574220620 in words is "sixty-six billion, five hundred seventy-four million, two hundred twenty thousand, six hundred twenty".