161515150666 has 16 divisors (see below), whose sum is σ = 250660454400. Its totient is φ = 77962410288.

The previous prime is 161515150529. The next prime is 161515150729. The reversal of 161515150666 is 666051515161.

161515150666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 260791 + ... + 625333.

It is an arithmetic number, because the mean of its divisors is an integer number (15666278400).

Almost surely, 2^161515150666 is an apocalyptic number.

161515150666 is a deficient number, since it is larger than the sum of its proper divisors (89145303734).

161515150666 is a wasteful number, since it uses less digits than its factorization.

161515150666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372213.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 161515150666 in words is "one hundred sixty-one billion, five hundred fifteen million, one hundred fifty thousand, six hundred sixty-six".