66428422220484 has 48 divisors (see below), whose sum is σ = 172936448879040. Its totient is φ = 22050928529280.

The previous prime is 66428422220477. The next prime is 66428422220497. The reversal of 66428422220484 is 48402222482466.

66428422220484 is a `hidden beast` number, since 6 + 6 + 4 + 2 + 8 + 422 + 2 + 204 + 8 + 4 = 666.

It is a super-2 number, since 2×66428422220484² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 66428422220484.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1276069374 + ... + 1276121429.

It is an arithmetic number, because the mean of its divisors is an integer number (3602842684980).

Almost surely, 2^{66428422220484} is an apocalyptic number.

It is an amenable number.

66428422220484 is an abundant number, since it is smaller than the sum of its proper divisors (106508026658556).

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

66428422220484 is a wasteful number, since it uses less digits than its factorization.

66428422220484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552191057 (or 2552191049 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 54.

The spelling of 66428422220484 in words is "sixty-six trillion, four hundred twenty-eight billion, four hundred twenty-two million, two hundred twenty thousand, four hundred eighty-four".