66001707 has 12 divisors (see below), whose sum is σ = 96952440. Its totient is φ = 43255008.

The previous prime is 66001699. The next prime is 66001711. The reversal of 66001707 is 70710066.

It is not a de Polignac number, because 66001707 - 2³ = 66001699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66002707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61618 + ... + 62679.

It is an arithmetic number, because the mean of its divisors is an integer number (8079370).

Almost surely, 2^66001707 is an apocalyptic number.

66001707 is a deficient number, since it is larger than the sum of its proper divisors (30950733).

66001707 is a wasteful number, since it uses less digits than its factorization.

66001707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124362 (or 124359 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 66001707 is about 8124.1434625442. The cubic root of 66001707 is about 404.1274860709.

The spelling of 66001707 in words is "sixty-six million, one thousand, seven hundred seven".