66763812 has 12 divisors (see below), whose sum is σ = 155782256. Its totient is φ = 22254600.

The previous prime is 66763793. The next prime is 66763817. The reversal of 66763812 is 21836766.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (66763817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2781814 + ... + 2781837.

Almost surely, 2^66763812 is an apocalyptic number.

It is an amenable number.

66763812 is an abundant number, since it is smaller than the sum of its proper divisors (89018444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66763812 is a wasteful number, since it uses less digits than its factorization.

66763812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563658 (or 5563656 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 66763812 is about 8170.9125561347. The cubic root of 66763812 is about 405.6769899639.

The spelling of 66763812 in words is "sixty-six million, seven hundred sixty-three thousand, eight hundred twelve".