426665545 has 8 divisors (see below), whose sum is σ = 529653960. Its totient is φ = 329562240.

The previous prime is 426665543. The next prime is 426665549. The reversal of 426665545 is 545566624.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 179452816 + 247212729 = 13396^2 + 15723^2 .

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

It is not a de Polignac number, because 426665545 - 2¹ = 426665543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426665543) 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, 1471116 + ... + 1471405.

It is an arithmetic number, because the mean of its divisors is an integer number (66206745).

Almost surely, 2^426665545 is an apocalyptic number.

It is an amenable number.

426665545 is a deficient number, since it is larger than the sum of its proper divisors (102988415).

426665545 is a wasteful number, since it uses less digits than its factorization.

426665545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942555.

The product of its digits is 864000, while the sum is 43.

The square root of 426665545 is about 20655.8840285280. The cubic root of 426665545 is about 752.8281633988.

The spelling of 426665545 in words is "four hundred twenty-six million, six hundred sixty-five thousand, five hundred forty-five".