66063999 has 16 divisors (see below), whose sum is σ = 90869760. Its totient is φ = 42669600.

The previous prime is 66063983. The next prime is 66064043. The reversal of 66063999 is 99936066.

It is not a de Polignac number, because 66063999 - 2⁴ = 66063983 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66063929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11922 + ... + 16560.

It is an arithmetic number, because the mean of its divisors is an integer number (5679360).

Almost surely, 2^66063999 is an apocalyptic number.

66063999 is a deficient number, since it is larger than the sum of its proper divisors (24805761).

66063999 is a wasteful number, since it uses less digits than its factorization.

66063999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790.

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 66063999 is about 8127.9763164025. The cubic root of 66063999 is about 404.2545837628.

The spelling of 66063999 in words is "sixty-six million, sixty-three thousand, nine hundred ninety-nine".