66763811 has 8 divisors (see below), whose sum is σ = 70796880. Its totient is φ = 62742528.

The previous prime is 66763793. The next prime is 66763817. The reversal of 66763811 is 11836766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66763811 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 10520 + ... + 15626.

It is an arithmetic number, because the mean of its divisors is an integer number (8849610).

Almost surely, 2^66763811 is an apocalyptic number.

66763811 is a deficient number, since it is larger than the sum of its proper divisors (4033069).

66763811 is a wasteful number, since it uses less digits than its factorization.

66763811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893.

The product of its digits is 36288, while the sum is 38.

The square root of 66763811 is about 8170.9124949420. The cubic root of 66763811 is about 405.6769879385.

The spelling of 66763811 in words is "sixty-six million, seven hundred sixty-three thousand, eight hundred eleven".