1340666788 has 12 divisors (see below), whose sum is σ = 2361705472. Its totient is φ = 665893800.

The previous prime is 1340666759. The next prime is 1340666791. The reversal of 1340666788 is 8876660431.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109220 + ... + 1110427.

Almost surely, 2^1340666788 is an apocalyptic number.

It is an amenable number.

1340666788 is a deficient number, since it is larger than the sum of its proper divisors (1021038684).

1340666788 is a wasteful number, since it uses less digits than its factorization.

1340666788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219802 (or 2219800 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 1340666788 is about 36615.1169327643. The cubic root of 1340666788 is about 1102.6566058733.

The spelling of 1340666788 in words is "one billion, three hundred forty million, six hundred sixty-six thousand, seven hundred eighty-eight".