166505115 has 16 divisors (see below), whose sum is σ = 304466688. Its totient is φ = 76116576.

The previous prime is 166505111. The next prime is 166505137. The reversal of 166505115 is 511505661.

It is not a de Polignac number, because 166505115 - 2² = 166505111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166505111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792777 + ... + 792986.

It is an arithmetic number, because the mean of its divisors is an integer number (19029168).

Almost surely, 2^166505115 is an apocalyptic number.

166505115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166505115 is a deficient number, since it is larger than the sum of its proper divisors (137961573).

166505115 is a wasteful number, since it uses less digits than its factorization.

166505115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585778.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 166505115 is about 12903.6861012658. The cubic root of 166505115 is about 550.1433400502.

The spelling of 166505115 in words is "one hundred sixty-six million, five hundred five thousand, one hundred fifteen".