166507227959 has 2 divisors, whose sum is σ = 166507227960. Its totient is φ = 166507227958.

The previous prime is 166507227937. The next prime is 166507227967. The reversal of 166507227959 is 959722705661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166507227959 - 2¹² = 166507223863 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 166507227898 and 166507227907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166507227989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83253613979 + 83253613980.

It is an arithmetic number, because the mean of its divisors is an integer number (83253613980).

Almost surely, 2^166507227959 is an apocalyptic number.

166507227959 is a deficient number, since it is larger than the sum of its proper divisors (1).

166507227959 is an equidigital number, since it uses as much as digits as its factorization.

166507227959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 59.

The spelling of 166507227959 in words is "one hundred sixty-six billion, five hundred seven million, two hundred twenty-seven thousand, nine hundred fifty-nine".