666202406 has 8 divisors (see below), whose sum is σ = 1042751664. Its totient is φ = 318618520.

The previous prime is 666202391. The next prime is 666202417. The reversal of 666202406 is 604202666.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7241285 + ... + 7241376.

It is an arithmetic number, because the mean of its divisors is an integer number (130343958).

Almost surely, 2^666202406 is an apocalyptic number.

666202406 is a deficient number, since it is larger than the sum of its proper divisors (376549258).

666202406 is a wasteful number, since it uses less digits than its factorization.

666202406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14482686.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 666202406 is about 25810.8970398163. The cubic root of 666202406 is about 873.3776331212.

The spelling of 666202406 in words is "six hundred sixty-six million, two hundred two thousand, four hundred six".