666782124 has 48 divisors (see below), whose sum is σ = 1662192000. Its totient is φ = 207415296.

The previous prime is 666782107. The next prime is 666782141. The reversal of 666782124 is 421287666.

It is an interprime number because it is at equal distance from previous prime (666782107) and next prime (666782141).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6549 + ... + 37100.

It is an arithmetic number, because the mean of its divisors is an integer number (34629000).

Almost surely, 2^666782124 is an apocalyptic number.

It is an amenable number.

666782124 is an abundant number, since it is smaller than the sum of its proper divisors (995409876).

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

666782124 is a wasteful number, since it uses less digits than its factorization.

666782124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43742 (or 43740 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 666782124 is about 25822.1246995672. The cubic root of 666782124 is about 873.6308924607.

The spelling of 666782124 in words is "six hundred sixty-six million, seven hundred eighty-two thousand, one hundred twenty-four".