166743107 has 4 divisors (see below), whose sum is σ = 175519080. Its totient is φ = 157967136.

The previous prime is 166743103. The next prime is 166743113. The reversal of 166743107 is 701347661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 701347661 = 7 ⋅100192523.

It is a cyclic number.

It is not a de Polignac number, because 166743107 - 2² = 166743103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166743103) 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, 4387958 + ... + 4387995.

It is an arithmetic number, because the mean of its divisors is an integer number (43879770).

Almost surely, 2^166743107 is an apocalyptic number.

166743107 is a deficient number, since it is larger than the sum of its proper divisors (8775973).

166743107 is an equidigital number, since it uses as much as digits as its factorization.

166743107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775972.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 166743107 is about 12912.9046693608. The cubic root of 166743107 is about 550.4053287632.

The spelling of 166743107 in words is "one hundred sixty-six million, seven hundred forty-three thousand, one hundred seven".