165441666 has 32 divisors (see below), whose sum is σ = 357513408. Its totient is φ = 50736960.

The previous prime is 165441643. The next prime is 165441677. The reversal of 165441666 is 666144561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 21381 + ... + 28071.

It is an arithmetic number, because the mean of its divisors is an integer number (11172294).

Almost surely, 2^165441666 is an apocalyptic number.

165441666 is an abundant number, since it is smaller than the sum of its proper divisors (192071742).

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

165441666 is a wasteful number, since it uses less digits than its factorization.

165441666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026.

The product of its digits is 103680, while the sum is 39.

The square root of 165441666 is about 12862.4129151571. The cubic root of 165441666 is about 548.9696035938.

The spelling of 165441666 in words is "one hundred sixty-five million, four hundred forty-one thousand, six hundred sixty-six".