66812433 has 16 divisors (see below), whose sum is σ = 93331200. Its totient is φ = 42456960.

The previous prime is 66812429. The next prime is 66812443. The reversal of 66812433 is 33421866.

It is not a de Polignac number, because 66812433 - 2² = 66812429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66812394 and 66812403.

It is not an unprimeable number, because it can be changed into a prime (66812423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2013 + ... + 11733.

It is an arithmetic number, because the mean of its divisors is an integer number (5833200).

Almost surely, 2^66812433 is an apocalyptic number.

It is an amenable number.

66812433 is a deficient number, since it is larger than the sum of its proper divisors (26518767).

66812433 is a wasteful number, since it uses less digits than its factorization.

66812433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832.

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

The square root of 66812433 is about 8173.8872637198. The cubic root of 66812433 is about 405.7754446714.

The spelling of 66812433 in words is "sixty-six million, eight hundred twelve thousand, four hundred thirty-three".