1550666155 has 16 divisors (see below), whose sum is σ = 1880540640. Its totient is φ = 1227405312.

The previous prime is 1550666123. The next prime is 1550666179. The reversal of 1550666155 is 5516660551.

It is a cyclic number.

It is not a de Polignac number, because 1550666155 - 2⁵ = 1550666123 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 492747 + ... + 495883.

It is an arithmetic number, because the mean of its divisors is an integer number (117533790).

Almost surely, 2^1550666155 is an apocalyptic number.

1550666155 is a deficient number, since it is larger than the sum of its proper divisors (329874485).

1550666155 is a wasteful number, since it uses less digits than its factorization.

1550666155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158.

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

The square root of 1550666155 is about 39378.4986382163. The cubic root of 1550666155 is about 1157.4602965357.

The spelling of 1550666155 in words is "one billion, five hundred fifty million, six hundred sixty-six thousand, one hundred fifty-five".