166607967 has 4 divisors (see below), whose sum is σ = 222143960. Its totient is φ = 111071976.

The previous prime is 166607957. The next prime is 166607971. The reversal of 166607967 is 769706661.

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

It is not a de Polignac number, because 166607967 - 2²³ = 158219359 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 (166607927) 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, 27767992 + ... + 27767997.

It is an arithmetic number, because the mean of its divisors is an integer number (55535990).

Almost surely, 2^166607967 is an apocalyptic number.

166607967 is a deficient number, since it is larger than the sum of its proper divisors (55535993).

166607967 is an equidigital number, since it uses as much as digits as its factorization.

166607967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55535992.

The product of its (nonzero) digits is 571536, while the sum is 48.

The square root of 166607967 is about 12907.6708588343. The cubic root of 166607967 is about 550.2565932198.

The spelling of 166607967 in words is "one hundred sixty-six million, six hundred seven thousand, nine hundred sixty-seven".