115521666 has 16 divisors (see below), whose sum is σ = 248816064. Its totient is φ = 35545104.

The previous prime is 115521631. The next prime is 115521667. The reversal of 115521666 is 666125511.

It is not an unprimeable number, because it can be changed into a prime (115521667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740446 + ... + 740601.

It is an arithmetic number, because the mean of its divisors is an integer number (15551004).

Almost surely, 2^115521666 is an apocalyptic number.

115521666 is an abundant number, since it is smaller than the sum of its proper divisors (133294398).

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

115521666 is a wasteful number, since it uses less digits than its factorization.

115521666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481065.

The product of its digits is 10800, while the sum is 33.

The square root of 115521666 is about 10748.1005763809. The cubic root of 115521666 is about 487.0286178540.

The spelling of 115521666 in words is "one hundred fifteen million, five hundred twenty-one thousand, six hundred sixty-six".