66444265458 has 48 divisors (see below), whose sum is σ = 146877831360. Its totient is φ = 21700721952.

The previous prime is 66444265421. The next prime is 66444265471. The reversal of 66444265458 is 85456244466.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661953 + ... + 755691.

It is an arithmetic number, because the mean of its divisors is an integer number (3059954820).

Almost surely, 2^66444265458 is an apocalyptic number.

66444265458 is an abundant number, since it is smaller than the sum of its proper divisors (80433565902).

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

66444265458 is a wasteful number, since it uses less digits than its factorization.

66444265458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94543 (or 94540 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 54.

The spelling of 66444265458 in words is "sixty-six billion, four hundred forty-four million, two hundred sixty-five thousand, four hundred fifty-eight".