66031101 has 24 divisors (see below), whose sum is σ = 98658560. Its totient is φ = 42529536.

The previous prime is 66031093. The next prime is 66031109. The reversal of 66031101 is 10113066.

66031101 is a `hidden beast` number, since 660 + 3 + 1 + 1 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (66031093) and next prime (66031109).

It is not a de Polignac number, because 66031101 - 2³ = 66031093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031109) 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, 36660 + ... + 38418.

Almost surely, 2^66031101 is an apocalyptic number.

It is an amenable number.

66031101 is a deficient number, since it is larger than the sum of its proper divisors (32627459).

66031101 is a wasteful number, since it uses less digits than its factorization.

66031101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 66031101 is about 8125.9523134215. The cubic root of 66031101 is about 404.1874701777.

Adding to 66031101 its reverse (10113066), we get a palindrome (76144167).

The spelling of 66031101 in words is "sixty-six million, thirty-one thousand, one hundred one".