351666918 has 48 divisors (see below), whose sum is σ = 802470240. Its totient is φ = 111082752.

The previous prime is 351666911. The next prime is 351666919. The reversal of 351666918 is 819666153.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351666911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41230 + ... + 49022.

It is an arithmetic number, because the mean of its divisors is an integer number (16718130).

Almost surely, 2^351666918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351666918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401235120).

351666918 is an abundant number, since it is smaller than the sum of its proper divisors (450803322).

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

351666918 is a wasteful number, since it uses less digits than its factorization.

351666918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933 (or 7930 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 351666918 is about 18752.7842732753. The cubic root of 351666918 is about 705.8468893041.

The spelling of 351666918 in words is "three hundred fifty-one million, six hundred sixty-six thousand, nine hundred eighteen".