1766166540 has 24 divisors (see below), whose sum is σ = 4945266480. Its totient is φ = 470977728.

The previous prime is 1766166539. The next prime is 1766166551. The reversal of 1766166540 is 456616671.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1766166492 and 1766166501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14717995 + ... + 14718114.

It is an arithmetic number, because the mean of its divisors is an integer number (206052770).

Almost surely, 2^1766166540 is an apocalyptic number.

1766166540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1766166540 is an abundant number, since it is smaller than the sum of its proper divisors (3179099940).

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

1766166540 is a wasteful number, since it uses less digits than its factorization.

1766166540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29436121 (or 29436119 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1766166540 is about 42025.7842282568. The cubic root of 1766166540 is about 1208.7705883669.

The spelling of 1766166540 in words is "one billion, seven hundred sixty-six million, one hundred sixty-six thousand, five hundred forty".