6991061694 has 8 divisors (see below), whose sum is σ = 13982123400. Its totient is φ = 2330353896.

The previous prime is 6991061677. The next prime is 6991061699. The reversal of 6991061694 is 4961601996.

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

6991061694 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991061699) 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, 582588469 + ... + 582588480.

It is an arithmetic number, because the mean of its divisors is an integer number (1747765425).

Almost surely, 2^6991061694 is an apocalyptic number.

6991061694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6991061694 is a wasteful number, since it uses less digits than its factorization.

6991061694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165176954.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 6991061694 is about 83612.5689953371. The cubic root of 6991061694 is about 1912.1166281498.

The spelling of 6991061694 in words is "six billion, nine hundred ninety-one million, sixty-one thousand, six hundred ninety-four".