155666328 has 32 divisors (see below), whose sum is σ = 390231600. Its totient is φ = 51746688.

The previous prime is 155666317. The next prime is 155666333. The reversal of 155666328 is 823666551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155666328.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 258 + ... + 17646.

Almost surely, 2^155666328 is an apocalyptic number.

It is an amenable number.

155666328 is an abundant number, since it is smaller than the sum of its proper divisors (234565272).

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

155666328 is a wasteful number, since it uses less digits than its factorization.

155666328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17771 (or 17767 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 155666328 is about 12476.6312761097. The cubic root of 155666328 is about 537.9371779808.

The spelling of 155666328 in words is "one hundred fifty-five million, six hundred sixty-six thousand, three hundred twenty-eight".