66110663 has 4 divisors (see below), whose sum is σ = 67358088. Its totient is φ = 64863240.

The previous prime is 66110647. The next prime is 66110677. The reversal of 66110663 is 36601166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66110663 - 2⁴ = 66110647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115663) 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, 623633 + ... + 623738.

It is an arithmetic number, because the mean of its divisors is an integer number (16839522).

Almost surely, 2^66110663 is an apocalyptic number.

66110663 is a deficient number, since it is larger than the sum of its proper divisors (1247425).

66110663 is a wasteful number, since it uses less digits than its factorization.

66110663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247424.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66110663 is about 8130.8463889069. The cubic root of 66110663 is about 404.3497424795.

The spelling of 66110663 in words is "sixty-six million, one hundred ten thousand, six hundred sixty-three".