6669400518 has 40 divisors (see below), whose sum is σ = 16302983400. Its totient is φ = 2021029920.

The previous prime is 6669400511. The next prime is 6669400519. The reversal of 6669400518 is 8150049666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669400511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1869543 + ... + 1873106.

It is an arithmetic number, because the mean of its divisors is an integer number (407574585).

Almost surely, 2^6669400518 is an apocalyptic number.

6669400518 is an abundant number, since it is smaller than the sum of its proper divisors (9633582882).

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

6669400518 is a wasteful number, since it uses less digits than its factorization.

6669400518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742674 (or 3742665 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 6669400518 is about 81666.3977288089. The cubic root of 6669400518 is about 1882.3292878640.

The spelling of 6669400518 in words is "six billion, six hundred sixty-nine million, four hundred thousand, five hundred eighteen".