351666009 has 16 divisors (see below), whose sum is σ = 521283840. Its totient is φ = 234310320.

The previous prime is 351666001. The next prime is 351666017. The reversal of 351666009 is 900666153.

It is an interprime number because it is at equal distance from previous prime (351666001) and next prime (351666017).

It is not a de Polignac number, because 351666009 - 2³ = 351666001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (351666001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74304 + ... + 78894.

It is an arithmetic number, because the mean of its divisors is an integer number (32580240).

Almost surely, 2^351666009 is an apocalyptic number.

It is an amenable number.

351666009 is a deficient number, since it is larger than the sum of its proper divisors (169617831).

351666009 is a wasteful number, since it uses less digits than its factorization.

351666009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437 (or 7431 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 351666009 is about 18752.7600368586. The cubic root of 351666009 is about 705.8462811383.

The spelling of 351666009 in words is "three hundred fifty-one million, six hundred sixty-six thousand, nine".