66254433 has 16 divisors (see below), whose sum is σ = 101700480. Its totient is φ = 37581696.

The previous prime is 66254407. The next prime is 66254437. The reversal of 66254433 is 33445266.

It is not a de Polignac number, because 66254433 - 2⁹ = 66253921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66254394 and 66254403.

It is not an unprimeable number, because it can be changed into a prime (66254437) 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, 8638 + ... + 14391.

It is an arithmetic number, because the mean of its divisors is an integer number (6356280).

Almost surely, 2^66254433 is an apocalyptic number.

It is an amenable number.

66254433 is a deficient number, since it is larger than the sum of its proper divisors (35446047).

66254433 is a wasteful number, since it uses less digits than its factorization.

66254433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23176.

The product of its digits is 51840, while the sum is 33.

The square root of 66254433 is about 8139.6826105199. The cubic root of 66254433 is about 404.6426416381.

Adding to 66254433 its reverse (33445266), we get a palindrome (99699699).

The spelling of 66254433 in words is "sixty-six million, two hundred fifty-four thousand, four hundred thirty-three".