66763963 has 8 divisors (see below), whose sum is σ = 79619328. Its totient is φ = 54738024.

The previous prime is 66763937. The next prime is 66763969. The reversal of 66763963 is 36936766.

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

It is a cyclic number.

It is not a de Polignac number, because 66763963 - 2²⁵ = 33209531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66763969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207181 + ... + 207502.

It is an arithmetic number, because the mean of its divisors is an integer number (9952416).

Almost surely, 2^66763963 is an apocalyptic number.

66763963 is a deficient number, since it is larger than the sum of its proper divisors (12855365).

66763963 is a wasteful number, since it uses less digits than its factorization.

66763963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414713.

The product of its digits is 734832, while the sum is 46.

The square root of 66763963 is about 8170.9217962235. The cubic root of 66763963 is about 405.6772958042.

The spelling of 66763963 in words is "sixty-six million, seven hundred sixty-three thousand, nine hundred sixty-three".