66996824 has 8 divisors (see below), whose sum is σ = 125619060. Its totient is φ = 33498408.

The previous prime is 66996817. The next prime is 66996827. The reversal of 66996824 is 42869966.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66996827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4187294 + ... + 4187309.

Almost surely, 2^66996824 is an apocalyptic number.

It is an amenable number.

66996824 is a deficient number, since it is larger than the sum of its proper divisors (58622236).

66996824 is a wasteful number, since it uses less digits than its factorization.

66996824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374609 (or 8374605 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

The square root of 66996824 is about 8185.1587644957. The cubic root of 66996824 is about 406.1483922930.

The spelling of 66996824 in words is "sixty-six million, nine hundred ninety-six thousand, eight hundred twenty-four".