66245474634 has 32 divisors (see below), whose sum is σ = 134378766720. Its totient is φ = 21767289600.

The previous prime is 66245474623. The next prime is 66245474641. The reversal of 66245474634 is 43647454266.

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 15 ways as a sum of consecutive naturals, for example, 4631574 + ... + 4645854.

It is an arithmetic number, because the mean of its divisors is an integer number (4199336460).

Almost surely, 2^66245474634 is an apocalyptic number.

66245474634 is an abundant number, since it is smaller than the sum of its proper divisors (68133292086).

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

66245474634 is a wasteful number, since it uses less digits than its factorization.

66245474634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25246.

The product of its digits is 11612160, while the sum is 51.

The spelling of 66245474634 in words is "sixty-six billion, two hundred forty-five million, four hundred seventy-four thousand, six hundred thirty-four".