66444494 has 8 divisors (see below), whose sum is σ = 101300808. Its totient is φ = 32677560.

The previous prime is 66444491. The next prime is 66444529. The reversal of 66444494 is 49444466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66444491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272192 + ... + 272435.

It is an arithmetic number, because the mean of its divisors is an integer number (12662601).

Almost surely, 2^66444494 is an apocalyptic number.

66444494 is a deficient number, since it is larger than the sum of its proper divisors (34856314).

66444494 is a wasteful number, since it uses less digits than its factorization.

66444494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544690.

The product of its digits is 331776, while the sum is 41.

The square root of 66444494 is about 8151.3492134738. The cubic root of 66444494 is about 405.0291987281.

The spelling of 66444494 in words is "sixty-six million, four hundred forty-four thousand, four hundred ninety-four".