66001693 has 8 divisors (see below), whose sum is σ = 66538080. Its totient is φ = 65467920.

The previous prime is 66001681. The next prime is 66001699. The reversal of 66001693 is 39610066.

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

It is a cyclic number.

It is not a de Polignac number, because 66001693 - 2⁹ = 66001181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66001699) 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 7 ways as a sum of consecutive naturals, for example, 112146 + ... + 112732.

It is an arithmetic number, because the mean of its divisors is an integer number (8317260).

Almost surely, 2^66001693 is an apocalyptic number.

It is an amenable number.

66001693 is a deficient number, since it is larger than the sum of its proper divisors (536387).

66001693 is a wasteful number, since it uses less digits than its factorization.

66001693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 66001693 is about 8124.1426009149. The cubic root of 66001693 is about 404.1274574970.

The spelling of 66001693 in words is "sixty-six million, one thousand, six hundred ninety-three".