166601616 has 20 divisors (see below), whose sum is σ = 430387632. Its totient is φ = 55533856.

The previous prime is 166601609. The next prime is 166601623. The reversal of 166601616 is 616106661.

It is an interprime number because it is at equal distance from previous prime (166601609) and next prime (166601623).

It is a super-2 number, since 2×166601616² = 55512196907622912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735386 + ... + 1735481.

Almost surely, 2^166601616 is an apocalyptic number.

166601616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166601616 is an abundant number, since it is smaller than the sum of its proper divisors (263786016).

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

166601616 is a wasteful number, since it uses less digits than its factorization.

166601616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470878 (or 3470872 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 166601616 is about 12907.4248399904. The cubic root of 166601616 is about 550.2496013092.

The spelling of 166601616 in words is "one hundred sixty-six million, six hundred one thousand, six hundred sixteen".