1340666879 has 8 divisors (see below), whose sum is σ = 1369509120. Its totient is φ = 1312126936.

The previous prime is 1340666867. The next prime is 1340666881. The reversal of 1340666879 is 9786660431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340666879 - 2⁴ = 1340666863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340662879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66599 + ... + 84360.

It is an arithmetic number, because the mean of its divisors is an integer number (171188640).

Almost surely, 2^1340666879 is an apocalyptic number.

1340666879 is a deficient number, since it is larger than the sum of its proper divisors (28842241).

1340666879 is a wasteful number, since it uses less digits than its factorization.

1340666879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151149.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 1340666879 is about 36615.1181754204. The cubic root of 1340666879 is about 1102.6566308215.

The spelling of 1340666879 in words is "one billion, three hundred forty million, six hundred sixty-six thousand, eight hundred seventy-nine".