66750863 has 8 divisors (see below), whose sum is σ = 67931136. Its totient is φ = 65577400.

The previous prime is 66750833. The next prime is 66750883. The reversal of 66750863 is 36805766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66750863 is a prime.

It is a super-2 number, since 2×66750863² = 8911355422489538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66750863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66750833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20570 + ... + 23592.

It is an arithmetic number, because the mean of its divisors is an integer number (8491392).

Almost surely, 2^66750863 is an apocalyptic number.

66750863 is a deficient number, since it is larger than the sum of its proper divisors (1180273).

66750863 is a wasteful number, since it uses less digits than its factorization.

66750863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 66750863 is about 8170.1201337557. The cubic root of 66750863 is about 405.6507609294.

The spelling of 66750863 in words is "sixty-six million, seven hundred fifty thousand, eight hundred sixty-three".