666165210151 has 4 divisors (see below), whose sum is σ = 761331668752. Its totient is φ = 570998751552.

The previous prime is 666165210077. The next prime is 666165210167. The reversal of 666165210151 is 151012561666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151012561666 = 2 ⋅75506280833.

It is a cyclic number.

It is not a de Polignac number, because 666165210151 - 2⁷ = 666165210023 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 (666165220151) 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, 47583229290 + ... + 47583229303.

It is an arithmetic number, because the mean of its divisors is an integer number (190332917188).

Almost surely, 2^666165210151 is an apocalyptic number.

666165210151 is a deficient number, since it is larger than the sum of its proper divisors (95166458601).

666165210151 is an equidigital number, since it uses as much as digits as its factorization.

666165210151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95166458600.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 666165210151 in words is "six hundred sixty-six billion, one hundred sixty-five million, two hundred ten thousand, one hundred fifty-one".