65984666 has 8 divisors (see below), whose sum is σ = 107974944. Its totient is φ = 29993020.

The previous prime is 65984623. The next prime is 65984669. The reversal of 65984666 is 66648956.

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

It is a super-2 number, since 2×65984666² = 8707952294263112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65984669) 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, 1499630 + ... + 1499673.

It is an arithmetic number, because the mean of its divisors is an integer number (13496868).

Almost surely, 2^65984666 is an apocalyptic number.

65984666 is a deficient number, since it is larger than the sum of its proper divisors (41990278).

65984666 is a wasteful number, since it uses less digits than its factorization.

65984666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999316.

The product of its digits is 1866240, while the sum is 50.

The square root of 65984666 is about 8123.0946073525. The cubic root of 65984666 is about 404.0927024793.

The spelling of 65984666 in words is "sixty-five million, nine hundred eighty-four thousand, six hundred sixty-six".