66444507330 has 16 divisors (see below), whose sum is σ = 159466817664. Its totient is φ = 17718535280.

The previous prime is 66444507271. The next prime is 66444507331. The reversal of 66444507330 is 3370544466.

It is not an unprimeable number, because it can be changed into a prime (66444507331) by changing a digit.

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, 1107408426 + ... + 1107408485.

It is an arithmetic number, because the mean of its divisors is an integer number (9966676104).

Almost surely, 2^66444507330 is an apocalyptic number.

66444507330 is an abundant number, since it is smaller than the sum of its proper divisors (93022310334).

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

66444507330 is a wasteful number, since it uses less digits than its factorization.

66444507330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214816921.

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 66444507330 in words is "sixty-six billion, four hundred forty-four million, five hundred seven thousand, three hundred thirty".