66763291 has 16 divisors (see below), whose sum is σ = 77833728. Its totient is φ = 56088000.

The previous prime is 66763271. The next prime is 66763297. The reversal of 66763291 is 19236766.

It is a cyclic number.

It is not a de Polignac number, because 66763291 - 2⁵ = 66763259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66763297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87351 + ... + 88111.

It is an arithmetic number, because the mean of its divisors is an integer number (4864608).

Almost surely, 2^66763291 is an apocalyptic number.

66763291 is a deficient number, since it is larger than the sum of its proper divisors (11070437).

66763291 is a wasteful number, since it uses less digits than its factorization.

66763291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its digits is 81648, while the sum is 40.

The square root of 66763291 is about 8170.8806746886. The cubic root of 66763291 is about 405.6759347103.

The spelling of 66763291 in words is "sixty-six million, seven hundred sixty-three thousand, two hundred ninety-one".