161611165011066 has 16 divisors (see below), whose sum is σ = 342235408258944. Its totient is φ = 50701541964224.

The previous prime is 161611165011041. The next prime is 161611165011089. The reversal of 161611165011066 is 660110561116161.

It is a super-2 number, since 2×161611165011066² (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 7 ways as a sum of consecutive naturals, for example, 792211593090 + ... + 792211593293.

It is an arithmetic number, because the mean of its divisors is an integer number (21389713016184).

Almost surely, 2^{161611165011066} is an apocalyptic number.

161611165011066 is an abundant number, since it is smaller than the sum of its proper divisors (180624243247878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161611165011066 is a wasteful number, since it uses less digits than its factorization.

161611165011066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584423186405.

The product of its (nonzero) digits is 38880, while the sum is 42.

The spelling of 161611165011066 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred sixty-five million, eleven thousand, sixty-six".