66142133 has 4 divisors (see below), whose sum is σ = 66393888. Its totient is φ = 65890380.

The previous prime is 66142129. The next prime is 66142147. The reversal of 66142133 is 33124166.

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 66142133 - 2² = 66142129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66142123) 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, 125483 + ... + 126008.

It is an arithmetic number, because the mean of its divisors is an integer number (16598472).

Almost surely, 2^66142133 is an apocalyptic number.

It is an amenable number.

66142133 is a deficient number, since it is larger than the sum of its proper divisors (251755).

66142133 is a wasteful number, since it uses less digits than its factorization.

66142133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251754.

The product of its digits is 2592, while the sum is 26.

The square root of 66142133 is about 8132.7813815447. The cubic root of 66142133 is about 404.4138918278.

Adding to 66142133 its reverse (33124166), we get a palindrome (99266299).

The spelling of 66142133 in words is "sixty-six million, one hundred forty-two thousand, one hundred thirty-three".