161526666 has 16 divisors (see below), whose sum is σ = 369203904. Its totient is φ = 46150464.

The previous prime is 161526649. The next prime is 161526683. The reversal of 161526666 is 666625161.

161526666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161526649) and next prime (161526683).

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, 1922895 + ... + 1922978.

It is an arithmetic number, because the mean of its divisors is an integer number (23075244).

Almost surely, 2^161526666 is an apocalyptic number.

161526666 is an abundant number, since it is smaller than the sum of its proper divisors (207677238).

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

161526666 is a wasteful number, since it uses less digits than its factorization.

161526666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845885.

The product of its digits is 77760, while the sum is 39.

The square root of 161526666 is about 12709.3141435720. The cubic root of 161526666 is about 544.6047309297.

The spelling of 161526666 in words is "one hundred sixty-one million, five hundred twenty-six thousand, six hundred sixty-six".