66356668 has 24 divisors (see below), whose sum is σ = 135539712. Its totient is φ = 27832944.

The previous prime is 66356663. The next prime is 66356701. The reversal of 66356668 is 86665366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66356663) 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, 23896 + ... + 26527.

It is an arithmetic number, because the mean of its divisors is an integer number (5647488).

Almost surely, 2^66356668 is an apocalyptic number.

It is an amenable number.

66356668 is an abundant number, since it is smaller than the sum of its proper divisors (69183044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66356668 is a wasteful number, since it uses less digits than its factorization.

66356668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50481 (or 50479 counting only the distinct ones).

The product of its digits is 933120, while the sum is 46.

The square root of 66356668 is about 8145.9602257806. The cubic root of 66356668 is about 404.8506648532.

The spelling of 66356668 in words is "sixty-six million, three hundred fifty-six thousand, six hundred sixty-eight".