66935998 has 8 divisors (see below), whose sum is σ = 100460808. Its totient is φ = 33449064.

The previous prime is 66935983. The next prime is 66936011. The reversal of 66935998 is 89953966.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4536 + ... + 12427.

It is an arithmetic number, because the mean of its divisors is an integer number (12557601).

Almost surely, 2^66935998 is an apocalyptic number.

66935998 is a deficient number, since it is larger than the sum of its proper divisors (33524810).

66935998 is a wasteful number, since it uses less digits than its factorization.

66935998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18938.

The product of its digits is 3149280, while the sum is 55.

The square root of 66935998 is about 8181.4422933857. The cubic root of 66935998 is about 406.0254418767.

The spelling of 66935998 in words is "sixty-six million, nine hundred thirty-five thousand, nine hundred ninety-eight".