6698979450 has 120 divisors (see below), whose sum is σ = 18668096832. Its totient is φ = 1781131680.

The previous prime is 6698979449. The next prime is 6698979451. The reversal of 6698979450 is 549798966.

It is a happy number.

6698979450 is a `hidden beast` number, since 6 + 6 + 98 + 97 + 9 + 450 = 666.

It is an interprime number because it is at equal distance from previous prime (6698979449) and next prime (6698979451).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6698979451) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1484097 + ... + 1488603.

Almost surely, 2^6698979450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6698979450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9334048416).

6698979450 is an abundant number, since it is smaller than the sum of its proper divisors (11969117382).

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

6698979450 is a wasteful number, since it uses less digits than its factorization.

6698979450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898 (or 4884 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The square root of 6698979450 is about 81847.2934799924. The cubic root of 6698979450 is about 1885.1079075255.

The spelling of 6698979450 in words is "six billion, six hundred ninety-eight million, nine hundred seventy-nine thousand, four hundred fifty".