66245986 has 8 divisors (see below), whose sum is σ = 99417600. Its totient is φ = 33106788.

The previous prime is 66245981. The next prime is 66246007. The reversal of 66245986 is 68954266.

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

It is a super-2 number, since 2×66245986² = 8777061322224392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66245981) 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, 2106 + ... + 11701.

It is an arithmetic number, because the mean of its divisors is an integer number (12427200).

Almost surely, 2^66245986 is an apocalyptic number.

66245986 is a deficient number, since it is larger than the sum of its proper divisors (33171614).

66245986 is a wasteful number, since it uses less digits than its factorization.

66245986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16208.

The product of its digits is 622080, while the sum is 46.

The square root of 66245986 is about 8139.1637162549. The cubic root of 66245986 is about 404.6254444911.

The spelling of 66245986 in words is "sixty-six million, two hundred forty-five thousand, nine hundred eighty-six".