66350663 has 4 divisors (see below), whose sum is σ = 66516528. Its totient is φ = 66184800.

The previous prime is 66350659. The next prime is 66350671. The reversal of 66350663 is 36605366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66350663 - 2² = 66350659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66350693) 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, 82331 + ... + 83132.

It is an arithmetic number, because the mean of its divisors is an integer number (16629132).

Almost surely, 2^66350663 is an apocalyptic number.

66350663 is a deficient number, since it is larger than the sum of its proper divisors (165865).

66350663 is a wasteful number, since it uses less digits than its factorization.

66350663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165864.

The product of its (nonzero) digits is 58320, while the sum is 35.

The square root of 66350663 is about 8145.5916298327. The cubic root of 66350663 is about 404.8384520560.

The spelling of 66350663 in words is "sixty-six million, three hundred fifty thousand, six hundred sixty-three".