66963782 has 16 divisors (see below), whose sum is σ = 109786752. Its totient is φ = 30495360.

The previous prime is 66963781. The next prime is 66963791. The reversal of 66963782 is 28736966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66963781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30713 + ... + 32820.

It is an arithmetic number, because the mean of its divisors is an integer number (6861672).

Almost surely, 2^66963782 is an apocalyptic number.

66963782 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66963782 is a deficient number, since it is larger than the sum of its proper divisors (42822970).

66963782 is a wasteful number, since it uses less digits than its factorization.

66963782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63583.

The product of its digits is 653184, while the sum is 47.

The square root of 66963782 is about 8183.1401063406. The cubic root of 66963782 is about 406.0816122022.

The spelling of 66963782 in words is "sixty-six million, nine hundred sixty-three thousand, seven hundred eighty-two".