66433253 has 4 divisors (see below), whose sum is σ = 69929760. Its totient is φ = 62936748.

The previous prime is 66433219. The next prime is 66433259. The reversal of 66433253 is 35233466.

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 66433253 - 2⁶ = 66433189 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 (66433259) 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, 1748225 + ... + 1748262.

It is an arithmetic number, because the mean of its divisors is an integer number (17482440).

Almost surely, 2^66433253 is an apocalyptic number.

It is an amenable number.

66433253 is a deficient number, since it is larger than the sum of its proper divisors (3496507).

66433253 is a wasteful number, since it uses less digits than its factorization.

66433253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496506.

The product of its digits is 38880, while the sum is 32.

The square root of 66433253 is about 8150.6596665546. The cubic root of 66433253 is about 405.0063566548.

The spelling of 66433253 in words is "sixty-six million, four hundred thirty-three thousand, two hundred fifty-three".