7000000669991 has 8 divisors (see below), whose sum is σ = 8347826886144. Its totient is φ = 5739130983960.

The previous prime is 7000000669957. The next prime is 7000000670029. The reversal of 7000000669991 is 1999660000007.

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-7000000669991 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 (7000000669931) 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, 21739132355 + ... + 21739132676.

It is an arithmetic number, because the mean of its divisors is an integer number (1043478360768).

Almost surely, 2^{7000000669991} is an apocalyptic number.

7000000669991 is a deficient number, since it is larger than the sum of its proper divisors (1347826216153).

7000000669991 is a wasteful number, since it uses less digits than its factorization.

7000000669991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43478265061.

The product of its (nonzero) digits is 183708, while the sum is 47.

Adding to 7000000669991 its reverse (1999660000007), we get a palindrome (8999660669998).

The spelling of 7000000669991 in words is "seven trillion, six hundred sixty-nine thousand, nine hundred ninety-one".