166209330 has 32 divisors (see below), whose sum is σ = 455889024. Its totient is φ = 37990656.

The previous prime is 166209301. The next prime is 166209467. The reversal of 166209330 is 33902661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 395527 + ... + 395946.

It is an arithmetic number, because the mean of its divisors is an integer number (14246532).

Almost surely, 2^166209330 is an apocalyptic number.

166209330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166209330 is an abundant number, since it is smaller than the sum of its proper divisors (289679694).

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

166209330 is a wasteful number, since it uses less digits than its factorization.

166209330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791490.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 166209330 is about 12892.2197468085. The cubic root of 166209330 is about 549.8173828983.

The spelling of 166209330 in words is "one hundred sixty-six million, two hundred nine thousand, three hundred thirty".