166666532 has 6 divisors (see below), whose sum is σ = 291666438. Its totient is φ = 83333264.

The previous prime is 166666481. The next prime is 166666547. The reversal of 166666532 is 235666661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 90174016 + 76492516 = 9496^2 + 8746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166666532.

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 as a sum of consecutive naturals, namely, 20833313 + ... + 20833320.

It is an arithmetic number, because the mean of its divisors is an integer number (48611073).

Almost surely, 2^166666532 is an apocalyptic number.

It is an amenable number.

166666532 is a deficient number, since it is larger than the sum of its proper divisors (124999906).

166666532 is a wasteful number, since it uses less digits than its factorization.

166666532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41666637 (or 41666635 counting only the distinct ones).

The product of its digits is 233280, while the sum is 41.

The square root of 166666532 is about 12909.9392717394. The cubic root of 166666532 is about 550.3210599292.

The spelling of 166666532 in words is "one hundred sixty-six million, six hundred sixty-six thousand, five hundred thirty-two".