166668886 has 8 divisors (see below), whose sum is σ = 250954704. Its totient is φ = 83017320.

The previous prime is 166668883. The next prime is 166668889. The reversal of 166668886 is 688866661.

It is an interprime number because it is at equal distance from previous prime (166668883) and next prime (166668889).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166668883) 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, 157905 + ... + 158956.

It is an arithmetic number, because the mean of its divisors is an integer number (31369338).

Almost surely, 2^166668886 is an apocalyptic number.

166668886 is a deficient number, since it is larger than the sum of its proper divisors (84285818).

166668886 is a wasteful number, since it uses less digits than its factorization.

166668886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317126.

The product of its digits is 3981312, while the sum is 55.

The square root of 166668886 is about 12910.0304414823. The cubic root of 166668886 is about 550.3236508307.

It can be divided in two parts, 16666 and 8886, that added together give a palindrome (25552).

The spelling of 166668886 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, eight hundred eighty-six".