4362021661 has 4 divisors (see below), whose sum is σ = 4362168924. Its totient is φ = 4361874400.

The previous prime is 4362021617. The next prime is 4362021683. The reversal of 4362021661 is 1661202634.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 797215225 + 3564806436 = 28235^2 + 59706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4362021661 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4362021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12010 + ... + 94171.

It is an arithmetic number, because the mean of its divisors is an integer number (1090542231).

Almost surely, 2^4362021661 is an apocalyptic number.

It is an amenable number.

4362021661 is a deficient number, since it is larger than the sum of its proper divisors (147263).

4362021661 is a wasteful number, since it uses less digits than its factorization.

4362021661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147262.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 4362021661 is about 66045.6028892159. The cubic root of 4362021661 is about 1633.9142958404.

The spelling of 4362021661 in words is "four billion, three hundred sixty-two million, twenty-one thousand, six hundred sixty-one".