66343665 has 16 divisors (see below), whose sum is σ = 106747200. Its totient is φ = 35184192.

The previous prime is 66343637. The next prime is 66343681. The reversal of 66343665 is 56634366.

It is a happy number.

It is not a de Polignac number, because 66343665 - 2⁵ = 66343633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9670 + ... + 15039.

It is an arithmetic number, because the mean of its divisors is an integer number (6671700).

Almost surely, 2^66343665 is an apocalyptic number.

It is an amenable number.

66343665 is a deficient number, since it is larger than the sum of its proper divisors (40403535).

66343665 is a wasteful number, since it uses less digits than its factorization.

66343665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24896.

The product of its digits is 233280, while the sum is 39.

The square root of 66343665 is about 8145.1620610028. The cubic root of 66343665 is about 404.8242187941.

The spelling of 66343665 in words is "sixty-six million, three hundred forty-three thousand, six hundred sixty-five".