6690040250004 has 72 divisors (see below), whose sum is σ = 17908049413800. Its totient is φ = 2098560294912.

The previous prime is 6690040249993. The next prime is 6690040250009. The reversal of 6690040250004 is 4000520400966.

6690040250004 is a `hidden beast` number, since 66 + 90 + 0 + 4 + 0 + 2 + 500 + 0 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1690254809604 + 4999785440400 = 1300098^2 + 2236020^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690040250009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3966622 + ... + 5395754.

It is an arithmetic number, because the mean of its divisors is an integer number (248722908525).

Almost surely, 2^{6690040250004} is an apocalyptic number.

It is an amenable number.

6690040250004 is an abundant number, since it is smaller than the sum of its proper divisors (11218009163796).

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

6690040250004 is a wasteful number, since it uses less digits than its factorization.

6690040250004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436809 (or 1436804 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 6690040250004 in words is "six trillion, six hundred ninety billion, forty million, two hundred fifty thousand, four".