66496963 has 16 divisors (see below), whose sum is σ = 74866176. Its totient is φ = 58655520.

The previous prime is 66496921. The next prime is 66496981. The reversal of 66496963 is 36969466.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66496963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66416963) 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, 25008 + ... + 27538.

It is an arithmetic number, because the mean of its divisors is an integer number (4679136).

Almost surely, 2^66496963 is an apocalyptic number.

66496963 is a deficient number, since it is larger than the sum of its proper divisors (8369213).

66496963 is a wasteful number, since it uses less digits than its factorization.

66496963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634.

The product of its digits is 1259712, while the sum is 49.

The square root of 66496963 is about 8154.5670026066. The cubic root of 66496963 is about 405.1357833590.

The spelling of 66496963 in words is "sixty-six million, four hundred ninety-six thousand, nine hundred sixty-three".