166554013 has 8 divisors (see below), whose sum is σ = 170787960. Its totient is φ = 162328320.

The previous prime is 166553999. The next prime is 166554043. The reversal of 166554013 is 310455661.

It can be written as a sum of positive squares in 4 ways, for example, as 2022084 + 164531929 = 1422^2 + 12827^2 .

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 166554013 - 2¹⁷ = 166422941 is a prime.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68881 + ... + 71257.

It is an arithmetic number, because the mean of its divisors is an integer number (21348495).

Almost surely, 2^166554013 is an apocalyptic number.

It is an amenable number.

166554013 is a deficient number, since it is larger than the sum of its proper divisors (4233947).

166554013 is a wasteful number, since it uses less digits than its factorization.

166554013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 166554013 is about 12905.5806920882. The cubic root of 166554013 is about 550.1971887986.

The spelling of 166554013 in words is "one hundred sixty-six million, five hundred fifty-four thousand, thirteen".