166206150731 has 2 divisors, whose sum is σ = 166206150732. Its totient is φ = 166206150730.

The previous prime is 166206150709. The next prime is 166206150751. The reversal of 166206150731 is 137051602661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166206150731 - 2⁶ = 166206150667 is a prime.

It is a super-2 number, since 2×166206150731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166206150751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83103075365 + 83103075366.

It is an arithmetic number, because the mean of its divisors is an integer number (83103075366).

Almost surely, 2^166206150731 is an apocalyptic number.

166206150731 is a deficient number, since it is larger than the sum of its proper divisors (1).

166206150731 is an equidigital number, since it uses as much as digits as its factorization.

166206150731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 166206150731 in words is "one hundred sixty-six billion, two hundred six million, one hundred fifty thousand, seven hundred thirty-one".