6690144279 has 16 divisors (see below), whose sum is σ = 10978698752. Its totient is φ = 3528867168.

The previous prime is 6690144269. The next prime is 6690144287. The reversal of 6690144279 is 9724410966.

It is a happy number.

It is not a de Polignac number, because 6690144279 - 2¹⁵ = 6690111511 is a prime.

It is a super-3 number, since 3×6690144279³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690144269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12252739 + ... + 12253284.

It is an arithmetic number, because the mean of its divisors is an integer number (686168672).

Almost surely, 2^6690144279 is an apocalyptic number.

6690144279 is a deficient number, since it is larger than the sum of its proper divisors (4288554473).

6690144279 is a wasteful number, since it uses less digits than its factorization.

6690144279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24506046.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 6690144279 is about 81793.3021646638. The cubic root of 6690144279 is about 1884.2787972448.

The spelling of 6690144279 in words is "six billion, six hundred ninety million, one hundred forty-four thousand, two hundred seventy-nine".