6639274669041 has 81 divisors (see below), whose sum is σ = 11556466683723. Its totient is φ = 3662182329120.

The previous prime is 6639274669019. The next prime is 6639274669051. The reversal of 6639274669041 is 1409664729366.

The square root of 6639274669041 is 2576679.

It is a perfect power (a square), and thus also a powerful number.

6639274669041 is a `hidden beast` number, since 6 + 63 + 9 + 27 + 466 + 90 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3481474588641 + 3157800080400 = 1865871^2 + 1777020^2 .

It is not a de Polignac number, because 6639274669041 - 2⁷ = 6639274668913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6639274669041.

It is not an unprimeable number, because it can be changed into a prime (6639274669051) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1569195396 + ... + 1569199626.

Almost surely, 2^{6639274669041} is an apocalyptic number.

6639274669041 is the 2576679-th square number.

6639274669041 is the 1288340-th centered octagonal number.

It is an amenable number.

6639274669041 is a deficient number, since it is larger than the sum of its proper divisors (4917192014682).

6639274669041 is an frugal number, since it uses more digits than its factorization.

6639274669041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8540 (or 4270 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 63.

The spelling of 6639274669041 in words is "six trillion, six hundred thirty-nine billion, two hundred seventy-four million, six hundred sixty-nine thousand, forty-one".