166065616 has 20 divisors (see below), whose sum is σ = 323041824. Its totient is φ = 82700000.

The previous prime is 166065611. The next prime is 166065619. The reversal of 166065616 is 616560661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166065611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16660 + ... + 24691.

Almost surely, 2^166065616 is an apocalyptic number.

166065616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166065616 is a deficient number, since it is larger than the sum of its proper divisors (156976208).

166065616 is a wasteful number, since it uses less digits than its factorization.

166065616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41610 (or 41604 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 166065616 is about 12886.6448697867. The cubic root of 166065616 is about 549.6588694536.

It can be divided in two parts, 16606 and 5616, that added together give a palindrome (22222).

The spelling of 166065616 in words is "one hundred sixty-six million, sixty-five thousand, six hundred sixteen".