66420032201 has 4 divisors (see below), whose sum is σ = 69307859712. Its totient is φ = 63532204692.

The previous prime is 66420032183. The next prime is 66420032227. The reversal of 66420032201 is 10223002466.

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 66420032201 - 2¹⁰ = 66420031177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66420032251) 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, 1443913721 + ... + 1443913766.

It is an arithmetic number, because the mean of its divisors is an integer number (17326964928).

Almost surely, 2^66420032201 is an apocalyptic number.

It is an amenable number.

66420032201 is a deficient number, since it is larger than the sum of its proper divisors (2887827511).

66420032201 is a wasteful number, since it uses less digits than its factorization.

66420032201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887827510.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 66420032201 its reverse (10223002466), we get a palindrome (76643034667).

The spelling of 66420032201 in words is "sixty-six billion, four hundred twenty million, thirty-two thousand, two hundred one".