6670261639 has 2 divisors, whose sum is σ = 6670261640. Its totient is φ = 6670261638.

The previous prime is 6670261603. The next prime is 6670261679. The reversal of 6670261639 is 9361620766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6670261639 - 2¹¹ = 6670259591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6670261679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335130819 + 3335130820.

It is an arithmetic number, because the mean of its divisors is an integer number (3335130820).

Almost surely, 2^6670261639 is an apocalyptic number.

6670261639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6670261639 is an equidigital number, since it uses as much as digits as its factorization.

6670261639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 6670261639 is about 81671.6697453897. The cubic root of 6670261639 is about 1882.4102968202.

The spelling of 6670261639 in words is "six billion, six hundred seventy million, two hundred sixty-one thousand, six hundred thirty-nine".