66612433 has 4 divisors (see below), whose sum is σ = 66633840. Its totient is φ = 66591028.

The previous prime is 66612421. The next prime is 66612451. The reversal of 66612433 is 33421666.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33421666 = 2 ⋅16710833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66612433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66612395 and 66612404.

It is not an unprimeable number, because it can be changed into a prime (66612473) 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, 5035 + ... + 12592.

It is an arithmetic number, because the mean of its divisors is an integer number (16658460).

Almost surely, 2^66612433 is an apocalyptic number.

It is an amenable number.

66612433 is a deficient number, since it is larger than the sum of its proper divisors (21407).

66612433 is a wasteful number, since it uses less digits than its factorization.

66612433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21406.

The product of its digits is 15552, while the sum is 31.

The square root of 66612433 is about 8161.6440133101. The cubic root of 66612433 is about 405.3701498370.

The spelling of 66612433 in words is "sixty-six million, six hundred twelve thousand, four hundred thirty-three".