166560394 has 64 divisors (see below), whose sum is σ = 337784832. Its totient is φ = 59486400.

The previous prime is 166560367. The next prime is 166560437. The reversal of 166560394 is 493065661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542389 + ... + 542695.

It is an arithmetic number, because the mean of its divisors is an integer number (5277888).

Almost surely, 2^166560394 is an apocalyptic number.

166560394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166560394 is an abundant number, since it is smaller than the sum of its proper divisors (171224438).

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

166560394 is a wasteful number, since it uses less digits than its factorization.

166560394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 166560394 is about 12905.8279083521. The cubic root of 166560394 is about 550.2042150746.

The spelling of 166560394 in words is "one hundred sixty-six million, five hundred sixty thousand, three hundred ninety-four".