166961240 has 32 divisors (see below), whose sum is σ = 378378000. Its totient is φ = 66301824.

The previous prime is 166961239. The next prime is 166961261. The reversal of 166961240 is 42169661.

It is a self number, because there is not a number n which added to its sum of digits gives 166961240.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9455 + ... + 20574.

Almost surely, 2^166961240 is an apocalyptic number.

166961240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166961240 is an abundant number, since it is smaller than the sum of its proper divisors (211416760).

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

166961240 is a wasteful number, since it uses less digits than its factorization.

166961240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30179 (or 30175 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 166961240 is about 12921.3482268686. The cubic root of 166961240 is about 550.6452372287.

The spelling of 166961240 in words is "one hundred sixty-six million, nine hundred sixty-one thousand, two hundred forty".