66444793 has 8 divisors (see below), whose sum is σ = 67974912. Its totient is φ = 64919616.

The previous prime is 66444787. The next prime is 66444803. The reversal of 66444793 is 39744466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66444793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66448793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45196 + ... + 46642.

It is an arithmetic number, because the mean of its divisors is an integer number (8496864).

Almost surely, 2^66444793 is an apocalyptic number.

It is an amenable number.

66444793 is a deficient number, since it is larger than the sum of its proper divisors (1530119).

66444793 is a wasteful number, since it uses less digits than its factorization.

66444793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its digits is 435456, while the sum is 43.

The square root of 66444793 is about 8151.3675539752. The cubic root of 66444793 is about 405.0298062705.

The spelling of 66444793 in words is "sixty-six million, four hundred forty-four thousand, seven hundred ninety-three".