155155666 has 8 divisors (see below), whose sum is σ = 232853760. Its totient is φ = 77537748.

The previous prime is 155155657. The next prime is 155155681. The reversal of 155155666 is 666551551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14946 + ... + 23101.

It is an arithmetic number, because the mean of its divisors is an integer number (29106720).

Almost surely, 2^155155666 is an apocalyptic number.

155155666 is a deficient number, since it is larger than the sum of its proper divisors (77698094).

155155666 is a wasteful number, since it uses less digits than its factorization.

155155666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40088.

The product of its digits is 135000, while the sum is 40.

The square root of 155155666 is about 12456.1497261393. The cubic root of 155155666 is about 537.3483008711.

The spelling of 155155666 in words is "one hundred fifty-five million, one hundred fifty-five thousand, six hundred sixty-six".