161500011100066 has 32 divisors (see below), whose sum is σ = 255461265964800. Its totient is φ = 76361667580800.

The previous prime is 161500011100037. The next prime is 161500011100091. The reversal of 161500011100066 is 660001110005161.

161500011100066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161500011100066² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158421556 + ... + 159437728.

It is an arithmetic number, because the mean of its divisors is an integer number (7983164561400).

Almost surely, 2^{161500011100066} is an apocalyptic number.

161500011100066 is a deficient number, since it is larger than the sum of its proper divisors (93961254864734).

161500011100066 is a wasteful number, since it uses less digits than its factorization.

161500011100066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023754.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 161500011100066 in words is "one hundred sixty-one trillion, five hundred billion, eleven million, one hundred thousand, sixty-six".