699999999999998 has 4 divisors (see below), whose sum is σ = 1050000000000000. Its totient is φ = 349999999999998.

The previous prime is 699999999999991. The next prime is 700000000000051. The reversal of 699999999999998 is 899999999999996.

It is a semiprime because it is the product of two primes.

It is a super-9 number, since 9×699999999999998⁹ (a number of 135 digits) contains 999999999 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699999999999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174999999999998 + ... + 175000000000001.

It is an arithmetic number, because the mean of its divisors is an integer number (262500000000000).

Almost surely, 2^{699999999999998} is an apocalyptic number.

699999999999998 is a deficient number, since it is larger than the sum of its proper divisors (350000000000002).

699999999999998 is a wasteful number, since it uses less digits than its factorization.

699999999999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350000000000001.

The product of its digits is 122009559759792, while the sum is 131.

It can be divided in two parts, 69999999999999 and 8, that added together give a palindrome (70000000000007).

The spelling of 699999999999998 in words is "six hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".