66311101 has 8 divisors (see below), whose sum is σ = 70517304. Its totient is φ = 62138880.

The previous prime is 66311059. The next prime is 66311111. The reversal of 66311101 is 10111366.

It can be written as a sum of positive squares in 4 ways, for example, as 27311076 + 39000025 = 5226^2 + 6245^2 .

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 66311101 - 2¹³ = 66302909 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 (66311111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4410 + ... + 12331.

It is an arithmetic number, because the mean of its divisors is an integer number (8814663).

Almost surely, 2^66311101 is an apocalyptic number.

It is an amenable number.

66311101 is a deficient number, since it is larger than the sum of its proper divisors (4206203).

66311101 is a wasteful number, since it uses less digits than its factorization.

66311101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16991.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 66311101 is about 8143.1628376203. The cubic root of 66311101 is about 404.7579735678.

Adding to 66311101 its reverse (10111366), we get a palindrome (76422467).

The spelling of 66311101 in words is "sixty-six million, three hundred eleven thousand, one hundred one".