6690042885 has 32 divisors (see below), whose sum is σ = 11055882240. Its totient is φ = 3450888000.

The previous prime is 6690042883. The next prime is 6690042901. The reversal of 6690042885 is 5882400966.

It is a happy number.

It is not a de Polignac number, because 6690042885 - 2¹ = 6690042883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690042883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1084560 + ... + 1090710.

It is an arithmetic number, because the mean of its divisors is an integer number (345496320).

Almost surely, 2^6690042885 is an apocalyptic number.

It is an amenable number.

6690042885 is a deficient number, since it is larger than the sum of its proper divisors (4365839355).

6690042885 is a wasteful number, since it uses less digits than its factorization.

6690042885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529.

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 6690042885 is about 81792.6823438381. The cubic root of 6690042885 is about 1884.2692779917.

The spelling of 6690042885 in words is "six billion, six hundred ninety million, forty-two thousand, eight hundred eighty-five".