155225666 has 8 divisors (see below), whose sum is σ = 242961984. Its totient is φ = 74238340.

The previous prime is 155225659. The next prime is 155225669. The reversal of 155225666 is 666522551.

It is a happy number.

155225666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (155225669) 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, 1687190 + ... + 1687281.

It is an arithmetic number, because the mean of its divisors is an integer number (30370248).

Almost surely, 2^155225666 is an apocalyptic number.

155225666 is a deficient number, since it is larger than the sum of its proper divisors (87736318).

155225666 is a wasteful number, since it uses less digits than its factorization.

155225666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374496.

The product of its digits is 108000, while the sum is 38.

The square root of 155225666 is about 12458.9592663272. The cubic root of 155225666 is about 537.4290987063.

The spelling of 155225666 in words is "one hundred fifty-five million, two hundred twenty-five thousand, six hundred sixty-six".