2666390139 has 48 divisors (see below), whose sum is σ = 4522003200. Its totient is φ = 1482280128.

The previous prime is 2666390119. The next prime is 2666390171. The reversal of 2666390139 is 9310936662.

It is a happy number.

It is not a de Polignac number, because 2666390139 - 2⁵ = 2666390107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2666390094 and 2666390103.

It is not an unprimeable number, because it can be changed into a prime (2666390119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 726892 + ... + 730550.

It is an arithmetic number, because the mean of its divisors is an integer number (94208400).

Almost surely, 2^2666390139 is an apocalyptic number.

2666390139 is a deficient number, since it is larger than the sum of its proper divisors (1855613061).

2666390139 is a wasteful number, since it uses less digits than its factorization.

2666390139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984 (or 3981 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 2666390139 is about 51637.1004123973. The cubic root of 2666390139 is about 1386.6746136505.

The spelling of 2666390139 in words is "two billion, six hundred sixty-six million, three hundred ninety thousand, one hundred thirty-nine".