4212406665 has 24 divisors (see below), whose sum is σ = 7341858888. Its totient is φ = 2234200320.

The previous prime is 4212406661. The next prime is 4212406699. The reversal of 4212406665 is 5666042124.

4212406665 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 60279696 + 4152126969 = 7764^2 + 64437^2 .

It is not a de Polignac number, because 4212406665 - 2² = 4212406661 is a prime.

It is a super-2 number, since 2×4212406665² = 35488739822672844450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4212406661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250444 + ... + 266733.

It is an arithmetic number, because the mean of its divisors is an integer number (305910787).

Almost surely, 2^4212406665 is an apocalyptic number.

4212406665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4212406665 is a deficient number, since it is larger than the sum of its proper divisors (3129452223).

4212406665 is a wasteful number, since it uses less digits than its factorization.

4212406665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517369 (or 517366 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 4212406665 is about 64903.0558987788. The cubic root of 4212406665 is about 1615.0157564112.

Adding to 4212406665 its reverse (5666042124), we get a palindrome (9878448789).

The spelling of 4212406665 in words is "four billion, two hundred twelve million, four hundred six thousand, six hundred sixty-five".