66344666 has 8 divisors (see below), whose sum is σ = 99642144. Its totient is φ = 33130620.

The previous prime is 66344633. The next prime is 66344701. The reversal of 66344666 is 66644366.

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

It is a super-2 number, since 2×66344666² = 8803229413303112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18830 + ... + 22073.

It is an arithmetic number, because the mean of its divisors is an integer number (12455268).

Almost surely, 2^66344666 is an apocalyptic number.

66344666 is a deficient number, since it is larger than the sum of its proper divisors (33297478).

66344666 is a wasteful number, since it uses less digits than its factorization.

66344666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41716.

The product of its digits is 373248, while the sum is 41.

The square root of 66344666 is about 8145.2235082900. The cubic root of 66344666 is about 404.8262547936.

The spelling of 66344666 in words is "sixty-six million, three hundred forty-four thousand, six hundred sixty-six".