351666687 has 8 divisors (see below), whose sum is σ = 493567360. Its totient is φ = 222105240.

The previous prime is 351666587. The next prime is 351666701. The reversal of 351666687 is 786666153.

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

It is not a de Polignac number, because 351666687 - 2⁷ = 351666559 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 (351666187) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3084739 + ... + 3084852.

It is an arithmetic number, because the mean of its divisors is an integer number (61695920).

Almost surely, 2^351666687 is an apocalyptic number.

351666687 is a deficient number, since it is larger than the sum of its proper divisors (141900673).

351666687 is a wasteful number, since it uses less digits than its factorization.

351666687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169613.

The product of its digits is 1088640, while the sum is 48.

The square root of 351666687 is about 18752.7781141888. The cubic root of 351666687 is about 705.8467347538.

The spelling of 351666687 in words is "three hundred fifty-one million, six hundred sixty-six thousand, six hundred eighty-seven".