66634063 has 4 divisors (see below), whose sum is σ = 66826440. Its totient is φ = 66441688.

The previous prime is 66634037. The next prime is 66634081. The reversal of 66634063 is 36043666.

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 66634063 - 2⁵ = 66634031 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 (66634093) 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, 95668 + ... + 96361.

It is an arithmetic number, because the mean of its divisors is an integer number (16706610).

Almost surely, 2^66634063 is an apocalyptic number.

66634063 is a deficient number, since it is larger than the sum of its proper divisors (192377).

66634063 is a wasteful number, since it uses less digits than its factorization.

66634063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192376.

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 66634063 is about 8162.9690064339. The cubic root of 66634063 is about 405.4140215642.

The spelling of 66634063 in words is "sixty-six million, six hundred thirty-four thousand, sixty-three".