66733970 has 8 divisors (see below), whose sum is σ = 120121164. Its totient is φ = 26693584.

The previous prime is 66733969. The next prime is 66733987. The reversal of 66733970 is 7933766.

It can be written as a sum of positive squares in 2 ways, for example, as 58049161 + 8684809 = 7619^2 + 2947^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336689 + ... + 3336708.

Almost surely, 2^66733970 is an apocalyptic number.

66733970 is a deficient number, since it is larger than the sum of its proper divisors (53387194).

66733970 is a wasteful number, since it uses less digits than its factorization.

66733970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673404.

The product of its (nonzero) digits is 142884, while the sum is 41.

The square root of 66733970 is about 8169.0862402107. The cubic root of 66733970 is about 405.6165379688.

The spelling of 66733970 in words is "sixty-six million, seven hundred thirty-three thousand, nine hundred seventy".