166650797 has 4 divisors (see below), whose sum is σ = 167963136. Its totient is φ = 165338460.

The previous prime is 166650787. The next prime is 166650817. The reversal of 166650797 is 797056661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 797056661 = 6563 ⋅121447.

It is a cyclic number.

It is not a de Polignac number, because 166650797 - 2²⁰ = 165602221 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 (166650787) 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, 655979 + ... + 656232.

It is an arithmetic number, because the mean of its divisors is an integer number (41990784).

Almost surely, 2^166650797 is an apocalyptic number.

It is an amenable number.

166650797 is a deficient number, since it is larger than the sum of its proper divisors (1312339).

166650797 is a wasteful number, since it uses less digits than its factorization.

166650797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312338.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 166650797 is about 12909.3298431793. The cubic root of 166650797 is about 550.3037407664.

The spelling of 166650797 in words is "one hundred sixty-six million, six hundred fifty thousand, seven hundred ninety-seven".