666150015101 has 4 divisors (see below), whose sum is σ = 672045148092. Its totient is φ = 660254882112.

The previous prime is 666150015031. The next prime is 666150015163. The reversal of 666150015101 is 101510051666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276412011001 + 389738004100 = 525749^2 + 624290^2 .

It is a cyclic number.

It is not a de Polignac number, because 666150015101 - 2³⁴ = 648970145917 is a prime.

It is a super-3 number, since 3×666150015101³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666150095101) 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 3 ways as a sum of consecutive naturals, for example, 2947566326 + ... + 2947566551.

It is an arithmetic number, because the mean of its divisors is an integer number (168011287023).

Almost surely, 2^666150015101 is an apocalyptic number.

It is an amenable number.

666150015101 is a deficient number, since it is larger than the sum of its proper divisors (5895132991).

666150015101 is a wasteful number, since it uses less digits than its factorization.

666150015101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5895132990.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 666150015101 its reverse (101510051666), we get a palindrome (767660066767).

The spelling of 666150015101 in words is "six hundred sixty-six billion, one hundred fifty million, fifteen thousand, one hundred one".