166121022 has 8 divisors (see below), whose sum is σ = 332242056. Its totient is φ = 55373672.

The previous prime is 166121003. The next prime is 166121023. The reversal of 166121022 is 220121661.

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

166121022 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 166121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166121023) 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 3 ways as a sum of consecutive naturals, for example, 13843413 + ... + 13843424.

It is an arithmetic number, because the mean of its divisors is an integer number (41530257).

Almost surely, 2^166121022 is an apocalyptic number.

166121022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166121022 is a wasteful number, since it uses less digits than its factorization.

166121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27686842.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 166121022 is about 12888.7944354777. The cubic root of 166121022 is about 549.7199919058.

Adding to 166121022 its reverse (220121661), we get a palindrome (386242683).

The spelling of 166121022 in words is "one hundred sixty-six million, one hundred twenty-one thousand, twenty-two".