666032540 has 24 divisors (see below), whose sum is σ = 1418370912. Its totient is φ = 262660160.

The previous prime is 666032537. The next prime is 666032557. The reversal of 666032540 is 45230666.

It is a junction number, because it is equal to n+sod(n) for n = 666032497 and 666032506.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 233099 + ... + 235938.

It is an arithmetic number, because the mean of its divisors is an integer number (59098788).

Almost surely, 2^666032540 is an apocalyptic number.

It is an amenable number.

666032540 is an abundant number, since it is smaller than the sum of its proper divisors (752338372).

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

666032540 is a wasteful number, since it uses less digits than its factorization.

666032540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469117 (or 469115 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 666032540 is about 25807.6062431214. The cubic root of 666032540 is about 873.3033965355.

The spelling of 666032540 in words is "six hundred sixty-six million, thirty-two thousand, five hundred forty".