66699324 has 36 divisors (see below), whose sum is σ = 169008840. Its totient is φ = 22179360.

The previous prime is 66699319. The next prime is 66699331. The reversal of 66699324 is 42399666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66699324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14587 + ... + 18605.

It is an arithmetic number, because the mean of its divisors is an integer number (4694690).

Almost surely, 2^66699324 is an apocalyptic number.

It is an amenable number.

66699324 is an abundant number, since it is smaller than the sum of its proper divisors (102309516).

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

66699324 is a wasteful number, since it uses less digits than its factorization.

66699324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490 (or 4485 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 66699324 is about 8166.9654095019. The cubic root of 66699324 is about 405.5463317294.

The spelling of 66699324 in words is "sixty-six million, six hundred ninety-nine thousand, three hundred twenty-four".