66489201 has 16 divisors (see below), whose sum is σ = 99025920. Its totient is φ = 44090640.

The previous prime is 66489197. The next prime is 66489211. The reversal of 66489201 is 10298466.

66489201 is a `hidden beast` number, since 6 + 648 + 9 + 2 + 0 + 1 = 666.

It is not a de Polignac number, because 66489201 - 2² = 66489197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66489211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1290 + ... + 11603.

It is an arithmetic number, because the mean of its divisors is an integer number (6189120).

Almost surely, 2^66489201 is an apocalyptic number.

It is an amenable number.

66489201 is a deficient number, since it is larger than the sum of its proper divisors (32536719).

66489201 is a wasteful number, since it uses less digits than its factorization.

66489201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13093 (or 13087 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 66489201 is about 8154.0910590942. The cubic root of 66489201 is about 405.1200192992.

The spelling of 66489201 in words is "sixty-six million, four hundred eighty-nine thousand, two hundred one".