66372201 has 24 divisors (see below), whose sum is σ = 110308224. Its totient is φ = 37670400.

The previous prime is 66372197. The next prime is 66372217. The reversal of 66372201 is 10227366.

It is a happy number.

66372201 is a `hidden beast` number, since 6 + 637 + 2 + 20 + 1 = 666.

It is not a de Polignac number, because 66372201 - 2² = 66372197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66372281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6025 + ... + 13001.

It is an arithmetic number, because the mean of its divisors is an integer number (4596176).

Almost surely, 2^66372201 is an apocalyptic number.

It is an amenable number.

66372201 is a deficient number, since it is larger than the sum of its proper divisors (43936023).

66372201 is a wasteful number, since it uses less digits than its factorization.

66372201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141 (or 7138 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 66372201 is about 8146.9135873655. The cubic root of 66372201 is about 404.8822520066.

Adding to 66372201 its reverse (10227366), we get a palindrome (76599567).

The spelling of 66372201 in words is "sixty-six million, three hundred seventy-two thousand, two hundred one".