662666407 has 12 divisors (see below), whose sum is σ = 718737624. Its totient is φ = 610690080.

The previous prime is 662666393. The next prime is 662666419. The reversal of 662666407 is 704666266.

It is a de Polignac number, because none of the positive numbers 2^k-662666407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662666437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112557 + ... + 118297.

It is an arithmetic number, because the mean of its divisors is an integer number (59894802).

Almost surely, 2^662666407 is an apocalyptic number.

662666407 is a deficient number, since it is larger than the sum of its proper divisors (56071217).

662666407 is a wasteful number, since it uses less digits than its factorization.

662666407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450 (or 6437 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 662666407 is about 25742.3077248331. The cubic root of 662666407 is about 871.8296839146.

The spelling of 662666407 in words is "six hundred sixty-two million, six hundred sixty-six thousand, four hundred seven".