154066550642661 has 8 divisors (see below), whose sum is σ = 205500442989024. Its totient is φ = 102671846029040.

The previous prime is 154066550642659. The next prime is 154066550642671. The reversal of 154066550642661 is 166246055660451.

It is a happy number.

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 154066550642661 - 2¹ = 154066550642659 is a prime.

It is a super-2 number, since 2×154066550642661² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154066550642671) 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, 9796924011 + ... + 9796939736.

It is an arithmetic number, because the mean of its divisors is an integer number (25687555373628).

Almost surely, 2^{154066550642661} is an apocalyptic number.

It is an amenable number.

154066550642661 is a deficient number, since it is larger than the sum of its proper divisors (51433892346363).

154066550642661 is a wasteful number, since it uses less digits than its factorization.

154066550642661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19593866371.

The product of its (nonzero) digits is 31104000, while the sum is 57.

The spelling of 154066550642661 in words is "one hundred fifty-four trillion, sixty-six billion, five hundred fifty million, six hundred forty-two thousand, six hundred sixty-one".