666406350 has 36 divisors (see below), whose sum is σ = 1790412936. Its totient is φ = 177708240.

The previous prime is 666406331. The next prime is 666406369. The reversal of 666406350 is 53604666.

It is an interprime number because it is at equal distance from previous prime (666406331) and next prime (666406369).

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 17 ways as a sum of consecutive naturals, for example, 740002 + ... + 740901.

Almost surely, 2^666406350 is an apocalyptic number.

666406350 is an abundant number, since it is smaller than the sum of its proper divisors (1124006586).

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

666406350 is a wasteful number, since it uses less digits than its factorization.

666406350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480921 (or 1480913 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 666406350 is about 25814.8474719492. The cubic root of 666406350 is about 873.4667461563.

The spelling of 666406350 in words is "six hundred sixty-six million, four hundred six thousand, three hundred fifty".