6621465443 has 4 divisors (see below), whose sum is σ = 6634951608. Its totient is φ = 6607979280.

The previous prime is 6621465373. The next prime is 6621465493. The reversal of 6621465443 is 3445641266.

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

It is a cyclic number.

It is not a de Polignac number, because 6621465443 - 2¹⁴ = 6621449059 is a prime.

It is a super-2 number, since 2×6621465443² = 87687609225686372498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6621465443.

It is not an unprimeable number, because it can be changed into a prime (6621465493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6742346 + ... + 6743327.

It is an arithmetic number, because the mean of its divisors is an integer number (1658737902).

Almost surely, 2^6621465443 is an apocalyptic number.

6621465443 is a deficient number, since it is larger than the sum of its proper divisors (13486165).

6621465443 is a wasteful number, since it uses less digits than its factorization.

6621465443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13486164.

The product of its digits is 414720, while the sum is 41.

The square root of 6621465443 is about 81372.3874726556. The cubic root of 6621465443 is about 1877.8088099924.

The spelling of 6621465443 in words is "six billion, six hundred twenty-one million, four hundred sixty-five thousand, four hundred forty-three".