424426665 has 16 divisors (see below), whose sum is σ = 731320128. Its totient is φ = 208948416.

The previous prime is 424426663. The next prime is 424426697. The reversal of 424426665 is 566624424.

It is not a de Polignac number, because 424426665 - 2¹ = 424426663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (424426661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088079 + ... + 1088468.

It is an arithmetic number, because the mean of its divisors is an integer number (45707508).

Almost surely, 2^424426665 is an apocalyptic number.

It is an amenable number.

424426665 is a deficient number, since it is larger than the sum of its proper divisors (306893463).

424426665 is a wasteful number, since it uses less digits than its factorization.

424426665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176568.

The product of its digits is 276480, while the sum is 39.

The square root of 424426665 is about 20601.6180189809. The cubic root of 424426665 is about 751.5090593943.

The spelling of 424426665 in words is "four hundred twenty-four million, four hundred twenty-six thousand, six hundred sixty-five".