155666122 has 8 divisors (see below), whose sum is σ = 233915616. Its totient is φ = 77694252.

The previous prime is 155666101. The next prime is 155666123. The reversal of 155666122 is 221666551.

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 (155666123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67998 + ... + 70249.

It is an arithmetic number, because the mean of its divisors is an integer number (29239452).

Almost surely, 2^155666122 is an apocalyptic number.

155666122 is a deficient number, since it is larger than the sum of its proper divisors (78249494).

155666122 is a wasteful number, since it uses less digits than its factorization.

155666122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138812.

The product of its digits is 21600, while the sum is 34.

The square root of 155666122 is about 12476.6230206735. The cubic root of 155666122 is about 537.9369406888.

The spelling of 155666122 in words is "one hundred fifty-five million, six hundred sixty-six thousand, one hundred twenty-two".