66466616 has 16 divisors (see below), whose sum is σ = 125072640. Its totient is φ = 33113920.

The previous prime is 66466607. The next prime is 66466643. The reversal of 66466616 is 61666466.

It is a super-2 number, since 2×66466616² = 8835622084982912, which contains 22 as substring.

It is a congruent number.

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, 12536 + ... + 17031.

It is an arithmetic number, because the mean of its divisors is an integer number (7817040).

Almost surely, 2^66466616 is an apocalyptic number.

It is an amenable number.

66466616 is a deficient number, since it is larger than the sum of its proper divisors (58606024).

66466616 is a wasteful number, since it uses less digits than its factorization.

66466616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29854 (or 29850 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 66466616 is about 8152.7060538204. The cubic root of 66466616 is about 405.0741438203.

The spelling of 66466616 in words is "sixty-six million, four hundred sixty-six thousand, six hundred sixteen".