166891330 has 8 divisors (see below), whose sum is σ = 300404412. Its totient is φ = 66756528.

The previous prime is 166891327. The next prime is 166891331. The reversal of 166891330 is 33198661.

166891330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 155675529 + 11215801 = 12477^2 + 3349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 166891330.

It is not an unprimeable number, because it can be changed into a prime (166891331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8344557 + ... + 8344576.

Almost surely, 2^166891330 is an apocalyptic number.

166891330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166891330 is a deficient number, since it is larger than the sum of its proper divisors (133513082).

166891330 is a wasteful number, since it uses less digits than its factorization.

166891330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16689140.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 166891330 is about 12918.6427305658. The cubic root of 166891330 is about 550.5683711195.

The spelling of 166891330 in words is "one hundred sixty-six million, eight hundred ninety-one thousand, three hundred thirty".