66323966 has 8 divisors (see below), whose sum is σ = 100452144. Its totient is φ = 32839920.

The previous prime is 66323963. The next prime is 66323969. The reversal of 66323966 is 66932366.

It is an interprime number because it is at equal distance from previous prime (66323963) and next prime (66323969).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66323963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160775 + ... + 161186.

It is an arithmetic number, because the mean of its divisors is an integer number (12556518).

Almost surely, 2^66323966 is an apocalyptic number.

66323966 is a deficient number, since it is larger than the sum of its proper divisors (34128178).

66323966 is a wasteful number, since it uses less digits than its factorization.

66323966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322066.

The product of its digits is 209952, while the sum is 41.

The square root of 66323966 is about 8143.9527257960. The cubic root of 66323966 is about 404.7841475394.

Subtracting 66323966 from its reverse (66932366), we obtain a square (608400 = 780²).

The spelling of 66323966 in words is "sixty-six million, three hundred twenty-three thousand, nine hundred sixty-six".