6618820007 has 4 divisors (see below), whose sum is σ = 6712042896. Its totient is φ = 6525597120.

The previous prime is 6618819937. The next prime is 6618820037. The reversal of 6618820007 is 7000288166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7000288166 = 2 ⋅3500144083.

It is a cyclic number.

It is not a de Polignac number, because 6618820007 - 2¹² = 6618815911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618820037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46611338 + ... + 46611479.

It is an arithmetic number, because the mean of its divisors is an integer number (1678010724).

Almost surely, 2^6618820007 is an apocalyptic number.

6618820007 is a deficient number, since it is larger than the sum of its proper divisors (93222889).

6618820007 is an equidigital number, since it uses as much as digits as its factorization.

6618820007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93222888.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 6618820007 is about 81356.1307278069. The cubic root of 6618820007 is about 1877.5586999637.

The spelling of 6618820007 in words is "six billion, six hundred eighteen million, eight hundred twenty thousand, seven".