66750633 has 12 divisors (see below), whose sum is σ = 96507840. Its totient is φ = 44458776.

The previous prime is 66750613. The next prime is 66750637. The reversal of 66750633 is 33605766.

It is not a de Polignac number, because 66750633 - 2⁹ = 66750121 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66750637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9060 + ... + 14682.

It is an arithmetic number, because the mean of its divisors is an integer number (8042320).

Almost surely, 2^66750633 is an apocalyptic number.

It is an amenable number.

66750633 is a deficient number, since it is larger than the sum of its proper divisors (29757207).

66750633 is a wasteful number, since it uses less digits than its factorization.

66750633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6948 (or 6945 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 36.

The square root of 66750633 is about 8170.1060580631. The cubic root of 66750633 is about 405.6502950189.

The spelling of 66750633 in words is "sixty-six million, seven hundred fifty thousand, six hundred thirty-three".