155565066 has 32 divisors (see below), whose sum is σ = 315734400. Its totient is φ = 51093504.

The previous prime is 155565049. The next prime is 155565071. The reversal of 155565066 is 660565551.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134346 + ... + 135498.

It is an arithmetic number, because the mean of its divisors is an integer number (9866700).

Almost surely, 2^155565066 is an apocalyptic number.

155565066 is an abundant number, since it is smaller than the sum of its proper divisors (160169334).

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

155565066 is a wasteful number, since it uses less digits than its factorization.

155565066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 155565066 is about 12472.5725493981. The cubic root of 155565066 is about 537.8205087540.

The spelling of 155565066 in words is "one hundred fifty-five million, five hundred sixty-five thousand, sixty-six".