66666363 has 8 divisors (see below), whose sum is σ = 89768976. Its totient is φ = 44004000.

The previous prime is 66666361. The next prime is 66666371. The reversal of 66666363 is 36366666.

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

It is not a de Polignac number, because 66666363 - 2¹ = 66666361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66666361) 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, 109708 + ... + 110313.

It is an arithmetic number, because the mean of its divisors is an integer number (11221122).

Almost surely, 2^66666363 is an apocalyptic number.

66666363 is a deficient number, since it is larger than the sum of its proper divisors (23102613).

66666363 is a wasteful number, since it uses less digits than its factorization.

66666363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220125.

The product of its digits is 419904, while the sum is 42.

The square root of 66666363 is about 8164.9472135465. The cubic root of 66666363 is about 405.4795173833.

The spelling of 66666363 in words is "sixty-six million, six hundred sixty-six thousand, three hundred sixty-three".