6621047019 has 6 divisors (see below), whose sum is σ = 9563734596. Its totient is φ = 4414031340.

The previous prime is 6621047009. The next prime is 6621047023. The reversal of 6621047019 is 9107401266.

It is not a de Polignac number, because 6621047019 - 2⁵ = 6621046987 is a prime.

It is a super-2 number, since 2×6621047019² = 87676527255617572722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6621047009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367835937 + ... + 367835954.

It is an arithmetic number, because the mean of its divisors is an integer number (1593955766).

Almost surely, 2^6621047019 is an apocalyptic number.

6621047019 is a deficient number, since it is larger than the sum of its proper divisors (2942687577).

6621047019 is a wasteful number, since it uses less digits than its factorization.

6621047019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735671897 (or 735671894 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 6621047019 is about 81369.8163878966. The cubic root of 6621047019 is about 1877.7692549608.

The spelling of 6621047019 in words is "six billion, six hundred twenty-one million, forty-seven thousand, nineteen".