66654231 has 16 divisors (see below), whose sum is σ = 103486464. Its totient is φ = 37368864.

The previous prime is 66654221. The next prime is 66654239. The reversal of 66654231 is 13245666.

66654231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66654231 - 2⁶ = 66654167 is a prime.

It is a super-2 number, since 2×66654231² = 8885573020402722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66654192 and 66654201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66654239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28831 + ... + 31056.

It is an arithmetic number, because the mean of its divisors is an integer number (6467904).

Almost surely, 2^66654231 is an apocalyptic number.

66654231 is a deficient number, since it is larger than the sum of its proper divisors (36832233).

66654231 is a wasteful number, since it uses less digits than its factorization.

66654231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59950.

The product of its digits is 25920, while the sum is 33.

The square root of 66654231 is about 8164.2042478125. The cubic root of 66654231 is about 405.4549193915.

Adding to 66654231 its reverse (13245666), we get a palindrome (79899897).

The spelling of 66654231 in words is "sixty-six million, six hundred fifty-four thousand, two hundred thirty-one".