66904465 has 8 divisors (see below), whose sum is σ = 80622720. Its totient is φ = 53298672.

The previous prime is 66904459. The next prime is 66904471. The reversal of 66904465 is 56440966.

It is an interprime number because it is at equal distance from previous prime (66904459) and next prime (66904471).

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

It is a cyclic number.

It is not a de Polignac number, because 66904465 - 2³ = 66904457 is a prime.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26799 + ... + 29188.

It is an arithmetic number, because the mean of its divisors is an integer number (10077840).

Almost surely, 2^66904465 is an apocalyptic number.

It is an amenable number.

66904465 is a deficient number, since it is larger than the sum of its proper divisors (13718255).

66904465 is a wasteful number, since it uses less digits than its factorization.

66904465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56231.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 66904465 is about 8179.5149611698. The cubic root of 66904465 is about 405.9616734429.

The spelling of 66904465 in words is "sixty-six million, nine hundred four thousand, four hundred sixty-five".