65666361233 has 16 divisors (see below), whose sum is σ = 72321508800. Its totient is φ = 59126215680.

The previous prime is 65666361179. The next prime is 65666361239. The reversal of 65666361233 is 33216366656.

It is a cyclic number.

It is not a de Polignac number, because 65666361233 - 2⁶ = 65666361169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65666361239) 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, 1795433 + ... + 1831641.

It is an arithmetic number, because the mean of its divisors is an integer number (4520094300).

Almost surely, 2^65666361233 is an apocalyptic number.

It is an amenable number.

65666361233 is a deficient number, since it is larger than the sum of its proper divisors (6655147567).

65666361233 is a wasteful number, since it uses less digits than its factorization.

65666361233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37792.

The product of its digits is 2099520, while the sum is 47.

The spelling of 65666361233 in words is "sixty-five billion, six hundred sixty-six million, three hundred sixty-one thousand, two hundred thirty-three".