66102021201 has 32 divisors (see below), whose sum is σ = 92174911488. Its totient is φ = 42095188800.

The previous prime is 66102021199. The next prime is 66102021203. The reversal of 66102021201 is 10212020166.

It is an interprime number because it is at equal distance from previous prime (66102021199) and next prime (66102021203).

It is not a de Polignac number, because 66102021201 - 2¹ = 66102021199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66102021203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9861151 + ... + 9867851.

It is an arithmetic number, because the mean of its divisors is an integer number (2880465984).

Almost surely, 2^66102021201 is an apocalyptic number.

It is an amenable number.

66102021201 is a deficient number, since it is larger than the sum of its proper divisors (26072890287).

66102021201 is a wasteful number, since it uses less digits than its factorization.

66102021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 66102021201 its reverse (10212020166), we get a palindrome (76314041367).

The spelling of 66102021201 in words is "sixty-six billion, one hundred two million, twenty-one thousand, two hundred one".