66610366 has 8 divisors (see below), whose sum is σ = 100142424. Its totient is φ = 33229560.

The previous prime is 66610343. The next prime is 66610367. The reversal of 66610366 is 66301666.

It is a happy number.

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 (66610367) 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, 36705 + ... + 38476.

It is an arithmetic number, because the mean of its divisors is an integer number (12517803).

Almost surely, 2^66610366 is an apocalyptic number.

66610366 is a deficient number, since it is larger than the sum of its proper divisors (33532058).

66610366 is a wasteful number, since it uses less digits than its factorization.

66610366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75626.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 66610366 is about 8161.5173834282. The cubic root of 66610366 is about 405.3659568822.

The spelling of 66610366 in words is "sixty-six million, six hundred ten thousand, three hundred sixty-six".