351716665 has 8 divisors (see below), whose sum is σ = 426411720. Its totient is φ = 278472192.

The previous prime is 351716663. The next prime is 351716671. The reversal of 351716665 is 566617153.

It can be written as a sum of positive squares in 4 ways, for example, as 19784704 + 331931961 = 4448^2 + 18219^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 351716665 - 2¹ = 351716663 is a prime.

It is a super-2 number, since 2×351716665² = 247409224877444450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (351716663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362110 + ... + 363079.

It is an arithmetic number, because the mean of its divisors is an integer number (53301465).

Almost surely, 2^351716665 is an apocalyptic number.

It is an amenable number.

351716665 is a deficient number, since it is larger than the sum of its proper divisors (74695055).

351716665 is an equidigital number, since it uses as much as digits as its factorization.

351716665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725291.

The product of its digits is 113400, while the sum is 40.

The square root of 351716665 is about 18754.1106160756. The cubic root of 351716665 is about 705.8801709008.

The spelling of 351716665 in words is "three hundred fifty-one million, seven hundred sixteen thousand, six hundred sixty-five".