166346551 has 16 divisors (see below), whose sum is σ = 192538368. Its totient is φ = 140774400.

The previous prime is 166346549. The next prime is 166346567. The reversal of 166346551 is 155643661.

It is a cyclic number.

It is not a de Polignac number, because 166346551 - 2¹ = 166346549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166346551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166346351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259191 + ... + 259831.

It is an arithmetic number, because the mean of its divisors is an integer number (12033648).

Almost surely, 2^166346551 is an apocalyptic number.

166346551 is a deficient number, since it is larger than the sum of its proper divisors (26191817).

166346551 is a wasteful number, since it uses less digits than its factorization.

166346551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its digits is 64800, while the sum is 37.

The square root of 166346551 is about 12897.5405019717. The cubic root of 166346551 is about 549.9686494527.

The spelling of 166346551 in words is "one hundred sixty-six million, three hundred forty-six thousand, five hundred fifty-one".