66652101 has 12 divisors (see below), whose sum is σ = 98623980. Its totient is φ = 43350720.

The previous prime is 66652099. The next prime is 66652109. The reversal of 66652101 is 10125666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40335201 + 26316900 = 6351^2 + 5130^2 .

It is not a de Polignac number, because 66652101 - 2¹ = 66652099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89946 + ... + 90683.

It is an arithmetic number, because the mean of its divisors is an integer number (8218665).

Almost surely, 2^66652101 is an apocalyptic number.

It is an amenable number.

66652101 is a deficient number, since it is larger than the sum of its proper divisors (31971879).

66652101 is a wasteful number, since it uses less digits than its factorization.

66652101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180676 (or 180673 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 66652101 is about 8164.0737992745. The cubic root of 66652101 is about 405.4506004450.

Adding to 66652101 its reverse (10125666), we get a palindrome (76777767).

The spelling of 66652101 in words is "sixty-six million, six hundred fifty-two thousand, one hundred one".