4145626665 has 24 divisors (see below), whose sum is σ = 7189727688. Its totient is φ = 2209777920.

The previous prime is 4145626591. The next prime is 4145626703. The reversal of 4145626665 is 5666265414.

It can be written as a sum of positive squares in 4 ways, for example, as 596922624 + 3548704041 = 24432^2 + 59571^2 .

It is not a de Polignac number, because 4145626665 - 2¹⁴ = 4145610281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 4145626665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59925 + ... + 109005.

It is an arithmetic number, because the mean of its divisors is an integer number (299571987).

Almost surely, 2^4145626665 is an apocalyptic number.

4145626665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4145626665 is a deficient number, since it is larger than the sum of its proper divisors (3044101023).

4145626665 is a wasteful number, since it uses less digits than its factorization.

4145626665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50969 (or 50966 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 4145626665 is about 64386.5410237264. The cubic root of 4145626665 is about 1606.4358827610.

It can be divided in two parts, 41456 and 26665, that added together give a square (68121 = 261²).

The spelling of 4145626665 in words is "four billion, one hundred forty-five million, six hundred twenty-six thousand, six hundred sixty-five".