666536344 has 32 divisors (see below), whose sum is σ = 1282050000. Its totient is φ = 324679680.

The previous prime is 666536341. The next prime is 666536347. The reversal of 666536344 is 443635666.

It is a happy number.

666536344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666536341) and next prime (666536347).

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666536344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666536341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408859 + ... + 410485.

Almost surely, 2^666536344 is an apocalyptic number.

It is an amenable number.

666536344 is a deficient number, since it is larger than the sum of its proper divisors (615513656).

666536344 is a wasteful number, since it uses less digits than its factorization.

666536344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923 (or 2919 counting only the distinct ones).

The product of its digits is 933120, while the sum is 43.

The square root of 666536344 is about 25817.3651637808. The cubic root of 666536344 is about 873.5235373588.

The spelling of 666536344 in words is "six hundred sixty-six million, five hundred thirty-six thousand, three hundred forty-four".