666673340 has 12 divisors (see below), whose sum is σ = 1400014056. Its totient is φ = 266669328.

The previous prime is 666673297. The next prime is 666673361. The reversal of 666673340 is 43376666.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16666814 + ... + 16666853.

It is an arithmetic number, because the mean of its divisors is an integer number (116667838).

Almost surely, 2^666673340 is an apocalyptic number.

It is an amenable number.

666673340 is an abundant number, since it is smaller than the sum of its proper divisors (733340716).

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

666673340 is a wasteful number, since it uses less digits than its factorization.

666673340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33333676 (or 33333674 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 41.

The square root of 666673340 is about 25820.0182029370. The cubic root of 666673340 is about 873.5833795734.

It can be divided in two parts, 66667 and 3340, that added together give a palindrome (70007).

The spelling of 666673340 in words is "six hundred sixty-six million, six hundred seventy-three thousand, three hundred forty".