166554047 has 8 divisors (see below), whose sum is σ = 187961040. Its totient is φ = 146191360.

The previous prime is 166554043. The next prime is 166554053. The reversal of 166554047 is 740455661.

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 166554047 - 2² = 166554043 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 166554047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166554043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260738 + ... + 261375.

It is an arithmetic number, because the mean of its divisors is an integer number (23495130).

Almost surely, 2^166554047 is an apocalyptic number.

166554047 is a deficient number, since it is larger than the sum of its proper divisors (21406993).

166554047 is a wasteful number, since it uses less digits than its factorization.

166554047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522153.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 166554047 is about 12905.5820093477. The cubic root of 166554047 is about 550.1972262373.

It can be divided in two parts, 16655 and 4047, that added together give a palindrome (20702).

The spelling of 166554047 in words is "one hundred sixty-six million, five hundred fifty-four thousand, forty-seven".