66464455 has 8 divisors (see below), whose sum is σ = 81612432. Its totient is φ = 51934848.

The previous prime is 66464443. The next prime is 66464459. The reversal of 66464455 is 55446466.

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 66464455 - 2⁵ = 66464423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66464459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154354 + ... + 154783.

It is an arithmetic number, because the mean of its divisors is an integer number (10201554).

Almost surely, 2^66464455 is an apocalyptic number.

66464455 is a deficient number, since it is larger than the sum of its proper divisors (15147977).

66464455 is a wasteful number, since it uses less digits than its factorization.

66464455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309185.

The product of its digits is 345600, while the sum is 40.

The square root of 66464455 is about 8152.5735200610. The cubic root of 66464455 is about 405.0697537732.

The spelling of 66464455 in words is "sixty-six million, four hundred sixty-four thousand, four hundred fifty-five".