166440383011 has 4 divisors (see below), whose sum is σ = 190217580592. Its totient is φ = 142663185432.

The previous prime is 166440382963. The next prime is 166440383023. The reversal of 166440383011 is 110383044661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166440383011 - 2¹⁹ = 166439858723 is a prime.

It is a super-2 number, since 2×166440383011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166440383041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11888598780 + ... + 11888598793.

It is an arithmetic number, because the mean of its divisors is an integer number (47554395148).

Almost surely, 2^166440383011 is an apocalyptic number.

166440383011 is a deficient number, since it is larger than the sum of its proper divisors (23777197581).

166440383011 is an equidigital number, since it uses as much as digits as its factorization.

166440383011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23777197580.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 166440383011 in words is "one hundred sixty-six billion, four hundred forty million, three hundred eighty-three thousand, eleven".