66212133441 has 16 divisors (see below), whose sum is σ = 89248613376. Its totient is φ = 43659583056.

The previous prime is 66212133367. The next prime is 66212133469. The reversal of 66212133441 is 14433121266.

It is a happy number.

It is not a de Polignac number, because 66212133441 - 2²² = 66207939137 is a prime.

It is a super-2 number, since 2×66212133441² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66212133041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124126 + ... + 384488.

It is an arithmetic number, because the mean of its divisors is an integer number (5578038336).

Almost surely, 2^66212133441 is an apocalyptic number.

It is an amenable number.

66212133441 is a deficient number, since it is larger than the sum of its proper divisors (23036479935).

66212133441 is a wasteful number, since it uses less digits than its factorization.

66212133441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261292.

The product of its digits is 20736, while the sum is 33.

The spelling of 66212133441 in words is "sixty-six billion, two hundred twelve million, one hundred thirty-three thousand, four hundred forty-one".