166001000 has 64 divisors (see below), whose sum is σ = 423783360. Its totient is φ = 60360000.

The previous prime is 166000987. The next prime is 166001021. The reversal of 166001000 is 100661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3455 + ... + 18545.

It is an arithmetic number, because the mean of its divisors is an integer number (6621615).

Almost surely, 2^166001000 is an apocalyptic number.

166001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211891680).

166001000 is an abundant number, since it is smaller than the sum of its proper divisors (257782360).

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

166001000 is a wasteful number, since it uses less digits than its factorization.

166001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15123 (or 15109 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 166001000 is about 12884.1375341930. The cubic root of 166001000 is about 549.5875695946.

Adding to 166001000 its reverse (100661), we get a palindrome (166101661).

The spelling of 166001000 in words is "one hundred sixty-six million, one thousand".