66011701 has 16 divisors (see below), whose sum is σ = 76769280. Its totient is φ = 55595520.

The previous prime is 66011657. The next prime is 66011711. The reversal of 66011701 is 10711066.

It is a cyclic number.

It is not a de Polignac number, because 66011701 - 2¹⁷ = 65880629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129435 + ... + 129943.

It is an arithmetic number, because the mean of its divisors is an integer number (4798080).

Almost surely, 2^66011701 is an apocalyptic number.

It is an amenable number.

66011701 is a deficient number, since it is larger than the sum of its proper divisors (10757579).

66011701 is a wasteful number, since it uses less digits than its factorization.

66011701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 66011701 is about 8124.7585194884. The cubic root of 66011701 is about 404.1478827467.

Adding to 66011701 its reverse (10711066), we get a palindrome (76722767).

The spelling of 66011701 in words is "sixty-six million, eleven thousand, seven hundred one".