15550656166 has 4 divisors (see below), whose sum is σ = 23325984252. Its totient is φ = 7775328082.

The previous prime is 15550656161. The next prime is 15550656179. The reversal of 15550656166 is 66165605551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66165605551 = 29663 ⋅2230577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550656161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3887664040 + ... + 3887664043.

It is an arithmetic number, because the mean of its divisors is an integer number (5831496063).

Almost surely, 2^15550656166 is an apocalyptic number.

15550656166 is a deficient number, since it is larger than the sum of its proper divisors (7775328086).

15550656166 is an equidigital number, since it uses as much as digits as its factorization.

15550656166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775328085.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 15550656166 in words is "fifteen billion, five hundred fifty million, six hundred fifty-six thousand, one hundred sixty-six".