427416665 has 8 divisors (see below), whose sum is σ = 552353928. Its totient is φ = 315630720.

The previous prime is 427416653. The next prime is 427416667. The reversal of 427416665 is 566614724.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16908544 + 410508121 = 4112^2 + 20261^2 .

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

It is not a de Polignac number, because 427416665 - 2¹⁰ = 427415641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427416667) 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, 3287756 + ... + 3287885.

It is an arithmetic number, because the mean of its divisors is an integer number (69044241).

Almost surely, 2^427416665 is an apocalyptic number.

It is an amenable number.

427416665 is a deficient number, since it is larger than the sum of its proper divisors (124937263).

427416665 is a wasteful number, since it uses less digits than its factorization.

427416665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6575659.

The product of its digits is 241920, while the sum is 41.

The square root of 427416665 is about 20674.0577778045. The cubic root of 427416665 is about 753.2696745531.

The spelling of 427416665 in words is "four hundred twenty-seven million, four hundred sixteen thousand, six hundred sixty-five".