66231321254 has 16 divisors (see below), whose sum is σ = 117201970176. Its totient is φ = 27469211400.

The previous prime is 66231321187. The next prime is 66231321257. The reversal of 66231321254 is 45212313266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66231321257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76302932 + ... + 76303799.

It is an arithmetic number, because the mean of its divisors is an integer number (7325123136).

Almost surely, 2^66231321254 is an apocalyptic number.

66231321254 is a deficient number, since it is larger than the sum of its proper divisors (50970648922).

66231321254 is a wasteful number, since it uses less digits than its factorization.

66231321254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152606771.

The product of its digits is 51840, while the sum is 35.

It can be divided in two parts, 662313212 and 54, that added together give a palindrome (662313266).

The spelling of 66231321254 in words is "sixty-six billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred fifty-four".