66063939 has 8 divisors (see below), whose sum is σ = 88125120. Its totient is φ = 44022696.

The previous prime is 66063929. The next prime is 66063941. The reversal of 66063939 is 93936066.

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

It is not a de Polignac number, because 66063939 - 2⁴ = 66063923 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 66063939.

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 7 ways as a sum of consecutive naturals, for example, 6592 + ... + 13250.

It is an arithmetic number, because the mean of its divisors is an integer number (11015640).

Almost surely, 2^66063939 is an apocalyptic number.

66063939 is a deficient number, since it is larger than the sum of its proper divisors (22061181).

66063939 is a wasteful number, since it uses less digits than its factorization.

66063939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9969.

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 66063939 is about 8127.9726254460. The cubic root of 66063939 is about 404.2544613800.

The spelling of 66063939 in words is "sixty-six million, sixty-three thousand, nine hundred thirty-nine".