66674665 has 8 divisors (see below), whose sum is σ = 80074368. Its totient is φ = 53296560.

The previous prime is 66674627. The next prime is 66674687. The reversal of 66674665 is 56647666.

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

It is not a de Polignac number, because 66674665 - 2¹⁹ = 66150377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430 + ... + 11800.

It is an arithmetic number, because the mean of its divisors is an integer number (10009296).

Almost surely, 2^66674665 is an apocalyptic number.

It is an amenable number.

66674665 is a deficient number, since it is larger than the sum of its proper divisors (13399703).

66674665 is a wasteful number, since it uses less digits than its factorization.

66674665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10799.

The product of its digits is 1088640, while the sum is 46.

The square root of 66674665 is about 8165.4555904738. The cubic root of 66674665 is about 405.4963482161.

The spelling of 66674665 in words is "sixty-six million, six hundred seventy-four thousand, six hundred sixty-five".