420110665 has 16 divisors (see below), whose sum is σ = 544895568. Its totient is φ = 309102336.

The previous prime is 420110623. The next prime is 420110699. The reversal of 420110665 is 566011024.

It can be written as a sum of positive squares in 8 ways, for example, as 191102976 + 229007689 = 13824^2 + 15133^2 .

It is a cyclic number.

It is not a de Polignac number, because 420110665 - 2¹¹ = 420108617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6339 + ... + 29671.

It is an arithmetic number, because the mean of its divisors is an integer number (34055973).

Almost surely, 2^420110665 is an apocalyptic number.

It is an amenable number.

420110665 is a deficient number, since it is larger than the sum of its proper divisors (124784903).

420110665 is a wasteful number, since it uses less digits than its factorization.

420110665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23628.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 420110665 is about 20496.6013036308. The cubic root of 420110665 is about 748.9530072365.

Adding to 420110665 its reverse (566011024), we get a palindrome (986121689).

The spelling of 420110665 in words is "four hundred twenty million, one hundred ten thousand, six hundred sixty-five".