159666807 has 4 divisors (see below), whose sum is σ = 212889080. Its totient is φ = 106444536.

The previous prime is 159666781. The next prime is 159666809. The reversal of 159666807 is 708666951.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 159666807 - 2⁷ = 159666679 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 (159666809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26611132 + ... + 26611137.

It is an arithmetic number, because the mean of its divisors is an integer number (53222270).

Almost surely, 2^159666807 is an apocalyptic number.

159666807 is a deficient number, since it is larger than the sum of its proper divisors (53222273).

159666807 is an equidigital number, since it uses as much as digits as its factorization.

159666807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53222272.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 159666807 is about 12635.9331669648. The cubic root of 159666807 is about 542.5064177003.

The spelling of 159666807 in words is "one hundred fifty-nine million, six hundred sixty-six thousand, eight hundred seven".