66039996 has 48 divisors (see below), whose sum is σ = 168577920. Its totient is φ = 19955520.

The previous prime is 66039979. The next prime is 66039997. The reversal of 66039996 is 69993066.

It is a super-2 number, since 2×66039996² = 8722562143360032, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66039997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88995 + ... + 89733.

It is an arithmetic number, because the mean of its divisors is an integer number (3512040).

Almost surely, 2^66039996 is an apocalyptic number.

66039996 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66039996 is an abundant number, since it is smaller than the sum of its proper divisors (102537924).

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

66039996 is a wasteful number, since it uses less digits than its factorization.

66039996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1432 counting only the distinct ones).

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

The square root of 66039996 is about 8126.4996154556. The cubic root of 66039996 is about 404.2056186263.

The spelling of 66039996 in words is "sixty-six million, thirty-nine thousand, nine hundred ninety-six".