166556516 has 12 divisors (see below), whose sum is σ = 333113088. Its totient is φ = 71381352.

The previous prime is 166556513. The next prime is 166556519. The reversal of 166556516 is 615655661.

It is an interprime number because it is at equal distance from previous prime (166556513) and next prime (166556519).

166556516 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (166556513) 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, 2974196 + ... + 2974251.

It is an arithmetic number, because the mean of its divisors is an integer number (27759424).

Almost surely, 2^166556516 is an apocalyptic number.

It is an amenable number.

166556516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166556516 is a wasteful number, since it uses less digits than its factorization.

166556516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948458 (or 5948456 counting only the distinct ones).

The product of its digits is 162000, while the sum is 41.

The square root of 166556516 is about 12905.6776652759. The cubic root of 166556516 is about 550.1999449348.

The spelling of 166556516 in words is "one hundred sixty-six million, five hundred fifty-six thousand, five hundred sixteen".