66747863 has 16 divisors (see below), whose sum is σ = 85725696. Its totient is φ = 50513760.

The previous prime is 66747833. The next prime is 66747869. The reversal of 66747863 is 36874766.

It is a cyclic number.

It is not a de Polignac number, because 66747863 - 2⁶ = 66747799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66747869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13853 + ... + 18038.

It is an arithmetic number, because the mean of its divisors is an integer number (5357856).

Almost surely, 2^66747863 is an apocalyptic number.

66747863 is a deficient number, since it is larger than the sum of its proper divisors (18977833).

66747863 is a wasteful number, since it uses less digits than its factorization.

66747863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31934.

The product of its digits is 1016064, while the sum is 47.

The square root of 66747863 is about 8169.9365358612. The cubic root of 66747863 is about 405.6446837519.

The spelling of 66747863 in words is "sixty-six million, seven hundred forty-seven thousand, eight hundred sixty-three".