6620406419 has 8 divisors (see below), whose sum is σ = 7222932912. Its totient is φ = 6017991840.

The previous prime is 6620406413. The next prime is 6620406487. The reversal of 6620406419 is 9146040266.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620406419 is a prime.

It is a super-2 number, since 2×6620406419² = 87659562305472807122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6620406413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139157 + ... + 180569.

It is an arithmetic number, because the mean of its divisors is an integer number (902866614).

Almost surely, 2^6620406419 is an apocalyptic number.

6620406419 is a deficient number, since it is larger than the sum of its proper divisors (602526493).

6620406419 is a wasteful number, since it uses less digits than its factorization.

6620406419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55957.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 6620406419 is about 81365.8799436226. The cubic root of 6620406419 is about 1877.7086936539.

The spelling of 6620406419 in words is "six billion, six hundred twenty million, four hundred six thousand, four hundred nineteen".