1340666680 has 16 divisors (see below), whose sum is σ = 3016500120. Its totient is φ = 536266656.

The previous prime is 1340666671. The next prime is 1340666689. The reversal of 1340666680 is 866660431.

It is an interprime number because it is at equal distance from previous prime (1340666671) and next prime (1340666689).

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 33516667 = 1340666680 / (1 + 3 + 4 + 0 + 6 + 6 + 6 + 6 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340666689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16758294 + ... + 16758373.

Almost surely, 2^1340666680 is an apocalyptic number.

1340666680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340666680 is an abundant number, since it is smaller than the sum of its proper divisors (1675833440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340666680 is a wasteful number, since it uses less digits than its factorization.

1340666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33516678 (or 33516674 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1340666680 is about 36615.1154579635. The cubic root of 1340666680 is about 1102.6565762644.

The spelling of 1340666680 in words is "one billion, three hundred forty million, six hundred sixty-six thousand, six hundred eighty".