154661666193 has 8 divisors (see below), whose sum is σ = 229128394400. Its totient is φ = 103107777444.

The previous prime is 154661666191. The next prime is 154661666239. The reversal of 154661666193 is 391666166451.

It is not a de Polignac number, because 154661666193 - 2¹ = 154661666191 is a prime.

It is a super-2 number, since 2×154661666193² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154661666191) 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, 2864104903 + ... + 2864104956.

It is an arithmetic number, because the mean of its divisors is an integer number (28641049300).

Almost surely, 2^154661666193 is an apocalyptic number.

It is an amenable number.

154661666193 is a deficient number, since it is larger than the sum of its proper divisors (74466728207).

154661666193 is an equidigital number, since it uses as much as digits as its factorization.

154661666193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728209868 (or 5728209862 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 154661666193 in words is "one hundred fifty-four billion, six hundred sixty-one million, six hundred sixty-six thousand, one hundred ninety-three".