66766275 has 30 divisors (see below), whose sum is σ = 123677972. Its totient is φ = 35607600.

The previous prime is 66766261. The next prime is 66766283. The reversal of 66766275 is 57266766.

It is not a de Polignac number, because 66766275 - 2⁵ = 66766243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 66766275.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 14461 + ... + 18510.

Almost surely, 2^66766275 is an apocalyptic number.

66766275 is a deficient number, since it is larger than the sum of its proper divisors (56911697).

66766275 is a wasteful number, since it uses less digits than its factorization.

66766275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32993 (or 32979 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 66766275 is about 8171.0632723043. The cubic root of 66766275 is about 405.6819785454.

The spelling of 66766275 in words is "sixty-six million, seven hundred sixty-six thousand, two hundred seventy-five".