66747065 has 24 divisors (see below), whose sum is σ = 101647872. Its totient is φ = 41606880.

The previous prime is 66747053. The next prime is 66747073. The reversal of 66747065 is 56074766.

It is not a de Polignac number, because 66747065 - 2²⁴ = 49969849 is a prime.

It is a super-2 number, since 2×66747065² = 8910341372228450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9689 + ... + 15078.

It is an arithmetic number, because the mean of its divisors is an integer number (4235328).

Almost surely, 2^66747065 is an apocalyptic number.

It is an amenable number.

66747065 is a deficient number, since it is larger than the sum of its proper divisors (34900807).

66747065 is a wasteful number, since it uses less digits than its factorization.

66747065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24797 (or 24790 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 66747065 is about 8169.8876981266. The cubic root of 66747065 is about 405.6430671921.

The spelling of 66747065 in words is "sixty-six million, seven hundred forty-seven thousand, sixty-five".