427917665 has 8 divisors (see below), whose sum is σ = 586858560. Its totient is φ = 293429232.

The previous prime is 427917661. The next prime is 427917671. The reversal of 427917665 is 566719724.

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 427917665 - 2² = 427917661 is a prime.

It is a super-2 number, since 2×427917665² = 366227056038104450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (427917661) 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, 6113075 + ... + 6113144.

It is an arithmetic number, because the mean of its divisors is an integer number (73357320).

Almost surely, 2^427917665 is an apocalyptic number.

It is an amenable number.

427917665 is a deficient number, since it is larger than the sum of its proper divisors (158940895).

427917665 is a wasteful number, since it uses less digits than its factorization.

427917665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12226231.

The product of its digits is 635040, while the sum is 47.

The square root of 427917665 is about 20686.1708636470. The cubic root of 427917665 is about 753.5638767379.

The spelling of 427917665 in words is "four hundred twenty-seven million, nine hundred seventeen thousand, six hundred sixty-five".