155006661 has 8 divisors (see below), whose sum is σ = 207830880. Its totient is φ = 102760112.

The previous prime is 155006659. The next prime is 155006671. The reversal of 155006661 is 166600551.

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

It is a cyclic number.

It is not a de Polignac number, because 155006661 - 2¹ = 155006659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155006641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143790 + ... + 144863.

It is an arithmetic number, because the mean of its divisors is an integer number (25978860).

Almost surely, 2^155006661 is an apocalyptic number.

It is an amenable number.

155006661 is a deficient number, since it is larger than the sum of its proper divisors (52824219).

155006661 is a wasteful number, since it uses less digits than its factorization.

155006661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288835.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 155006661 is about 12450.1671073123. The cubic root of 155006661 is about 537.1762301791.

The spelling of 155006661 in words is "one hundred fifty-five million, six thousand, six hundred sixty-one".