2150066681 has 4 divisors (see below), whose sum is σ = 2457219072. Its totient is φ = 1842914292.

The previous prime is 2150066671. The next prime is 2150066719. The reversal of 2150066681 is 1866600512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2150066681 - 2⁶ = 2150066617 is a prime.

It is a super-2 number, since 2×2150066681² = 9245573465492711522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2150066651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153576185 + ... + 153576198.

It is an arithmetic number, because the mean of its divisors is an integer number (614304768).

Almost surely, 2^2150066681 is an apocalyptic number.

It is an amenable number.

2150066681 is a deficient number, since it is larger than the sum of its proper divisors (307152391).

2150066681 is an equidigital number, since it uses as much as digits as its factorization.

2150066681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307152390.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2150066681 is about 46368.8115116185. The cubic root of 2150066681 is about 1290.6762235890.

The spelling of 2150066681 in words is "two billion, one hundred fifty million, sixty-six thousand, six hundred eighty-one".