1387083666 has 16 divisors (see below), whose sum is σ = 2788543584. Its totient is φ = 459965184.

The previous prime is 1387083661. The next prime is 1387083671. The reversal of 1387083666 is 6663807831.

It is an interprime number because it is at equal distance from previous prime (1387083661) and next prime (1387083671).

It is not an unprimeable number, because it can be changed into a prime (1387083661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597756 + ... + 600071.

It is an arithmetic number, because the mean of its divisors is an integer number (174283974).

Almost surely, 2^1387083666 is an apocalyptic number.

1387083666 is an abundant number, since it is smaller than the sum of its proper divisors (1401459918).

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

1387083666 is a wasteful number, since it uses less digits than its factorization.

1387083666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198025.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 1387083666 is about 37243.5721433914. The cubic root of 1387083666 is about 1115.2379836148.

The spelling of 1387083666 in words is "one billion, three hundred eighty-seven million, eighty-three thousand, six hundred sixty-six".