166897801 has 8 divisors (see below), whose sum is σ = 192593024. Its totient is φ = 141665760.

The previous prime is 166897793. The next prime is 166897807. The reversal of 166897801 is 108798661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166897801 - 2³ = 166897793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166897807) 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 7 ways as a sum of consecutive naturals, for example, 115020 + ... + 116461.

It is an arithmetic number, because the mean of its divisors is an integer number (24074128).

Almost surely, 2^166897801 is an apocalyptic number.

It is an amenable number.

166897801 is a deficient number, since it is larger than the sum of its proper divisors (25695223).

166897801 is a wasteful number, since it uses less digits than its factorization.

166897801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231591.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 166897801 is about 12918.8931801451. The cubic root of 166897801 is about 550.5754868913.

The spelling of 166897801 in words is "one hundred sixty-six million, eight hundred ninety-seven thousand, eight hundred one".