66066001 has 4 divisors (see below), whose sum is σ = 66107392. Its totient is φ = 66024612.

The previous prime is 66065977. The next prime is 66066043. The reversal of 66066001 is 10066066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66066001 - 2⁷ = 66065873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66066101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18201 + ... + 21526.

It is an arithmetic number, because the mean of its divisors is an integer number (16526848).

Almost surely, 2^66066001 is an apocalyptic number.

It is an amenable number.

66066001 is a deficient number, since it is larger than the sum of its proper divisors (41391).

66066001 is a wasteful number, since it uses less digits than its factorization.

66066001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41390.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66066001 is about 8128.0994703559. The cubic root of 66066001 is about 404.2586672248.

The spelling of 66066001 in words is "sixty-six million, sixty-six thousand, one".