66631334 has 32 divisors (see below), whose sum is σ = 126337536. Its totient is φ = 25600320.

The previous prime is 66631319. The next prime is 66631343. The reversal of 66631334 is 43313666.

It is a self number, because there is not a number n which added to its sum of digits gives 66631334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8279 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (3948048).

Almost surely, 2^66631334 is an apocalyptic number.

66631334 is a deficient number, since it is larger than the sum of its proper divisors (59706202).

66631334 is a wasteful number, since it uses less digits than its factorization.

66631334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020.

The product of its digits is 23328, while the sum is 32.

The square root of 66631334 is about 8162.8018474051. The cubic root of 66631334 is about 405.4084869076.

It can be divided in two parts, 6663 and 1334, that added together give a palindrome (7997).

The spelling of 66631334 in words is "sixty-six million, six hundred thirty-one thousand, three hundred thirty-four".