18161066 has 48 divisors (see below), whose sum is σ = 36640512. Its totient is φ = 6652800.

The previous prime is 18161057. The next prime is 18161089. The reversal of 18161066 is 66016181.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17831 + ... + 18821.

It is an arithmetic number, because the mean of its divisors is an integer number (763344).

Almost surely, 2^18161066 is an apocalyptic number.

18161066 is an abundant number, since it is smaller than the sum of its proper divisors (18479446).

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

18161066 is a wasteful number, since it uses less digits than its factorization.

18161066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18161066 is about 4261.5802233444. The cubic root of 18161066 is about 262.8535089008.

It can be divided in two parts, 1816 and 1066, that added together give a palindrome (2882).

The spelling of 18161066 in words is "eighteen million, one hundred sixty-one thousand, sixty-six".