6626420489 has 4 divisors (see below), whose sum is σ = 7136145156. Its totient is φ = 6116695824.

The previous prime is 6626420477. The next prime is 6626420501. The reversal of 6626420489 is 9840246266.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (6626420477) and next prime (6626420501).

It can be written as a sum of positive squares in 2 ways, for example, as 2594170489 + 4032250000 = 50933^2 + 63500^2 .

It is a cyclic number.

It is not a de Polignac number, because 6626420489 - 2⁴ = 6626420473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6626420389) 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, 254862314 + ... + 254862339.

It is an arithmetic number, because the mean of its divisors is an integer number (1784036289).

Almost surely, 2^6626420489 is an apocalyptic number.

It is an amenable number.

6626420489 is a deficient number, since it is larger than the sum of its proper divisors (509724667).

6626420489 is a wasteful number, since it uses less digits than its factorization.

6626420489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509724666.

The product of its (nonzero) digits is 995328, while the sum is 47.

The square root of 6626420489 is about 81402.8285073682. The cubic root of 6626420489 is about 1878.2771005391.

The spelling of 6626420489 in words is "six billion, six hundred twenty-six million, four hundred twenty thousand, four hundred eighty-nine".