166440383010 has 256 divisors, whose sum is σ = 498752225280. Its totient is φ = 39142206720.

The previous prime is 166440382963. The next prime is 166440383023. The reversal of 166440383010 is 10383044661.

It is a happy number.

166440383010 is a `hidden beast` number, since 1 + 6 + 644 + 0 + 3 + 8 + 3 + 0 + 1 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40327567 + ... + 40331693.

It is an arithmetic number, because the mean of its divisors is an integer number (1948250880).

Almost surely, 2^166440383010 is an apocalyptic number.

166440383010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166440383010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249376112640).

166440383010 is an abundant number, since it is smaller than the sum of its proper divisors (332311842270).

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

166440383010 is a wasteful number, since it uses less digits than its factorization.

166440383010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4558 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 166440383010 in words is "one hundred sixty-six billion, four hundred forty million, three hundred eighty-three thousand, ten".