1340666699 has 4 divisors (see below), whose sum is σ = 1419529464. Its totient is φ = 1261803936.

The previous prime is 1340666689. The next prime is 1340666729. The reversal of 1340666699 is 9966660431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340666699 - 2²⁸ = 1072231243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340666629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39431357 + ... + 39431390.

It is an arithmetic number, because the mean of its divisors is an integer number (354882366).

Almost surely, 2^1340666699 is an apocalyptic number.

1340666699 is a deficient number, since it is larger than the sum of its proper divisors (78862765).

1340666699 is an equidigital number, since it uses as much as digits as its factorization.

1340666699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78862764.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 1340666699 is about 36615.1157174192. The cubic root of 1340666699 is about 1102.6565814734.

The spelling of 1340666699 in words is "one billion, three hundred forty million, six hundred sixty-six thousand, six hundred ninety-nine".