1661033166 has 32 divisors (see below), whose sum is σ = 3617822880. Its totient is φ = 505342464.

The previous prime is 1661033107. The next prime is 1661033177. The reversal of 1661033166 is 6613301661.

It is a congruent number.

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, 112695 + ... + 126578.

It is an arithmetic number, because the mean of its divisors is an integer number (113056965).

Almost surely, 2^1661033166 is an apocalyptic number.

1661033166 is an abundant number, since it is smaller than the sum of its proper divisors (1956789714).

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

1661033166 is a wasteful number, since it uses less digits than its factorization.

1661033166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239380.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 1661033166 is about 40755.7746337866. The cubic root of 1661033166 is about 1184.2937428406.

The spelling of 1661033166 in words is "one billion, six hundred sixty-one million, thirty-three thousand, one hundred sixty-six".