15001661560166 has 4 divisors (see below), whose sum is σ = 22502492340252. Its totient is φ = 7500830780082.

The previous prime is 15001661560163. The next prime is 15001661560177. The reversal of 15001661560166 is 66106516610051.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15001661560163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3750415390040 + ... + 3750415390043.

It is an arithmetic number, because the mean of its divisors is an integer number (5625623085063).

Almost surely, 2^{15001661560166} is an apocalyptic number.

15001661560166 is a deficient number, since it is larger than the sum of its proper divisors (7500830780086).

15001661560166 is an equidigital number, since it uses as much as digits as its factorization.

15001661560166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500830780085.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 15001661560166 in words is "fifteen trillion, one billion, six hundred sixty-one million, five hundred sixty thousand, one hundred sixty-six".