1387266066 has 12 divisors (see below), whose sum is σ = 3005743182. Its totient is φ = 462422016.

The previous prime is 1387266061. The next prime is 1387266077. The reversal of 1387266066 is 6606627831.

1387266066 is a `hidden beast` number, since 1 + 38 + 7 + 2 + 6 + 606 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1385402841 + 1863225 = 37221^2 + 1365^2 .

It is not an unprimeable number, because it can be changed into a prime (1387266061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38535151 + ... + 38535186.

Almost surely, 2^1387266066 is an apocalyptic number.

1387266066 is an abundant number, since it is smaller than the sum of its proper divisors (1618477116).

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

1387266066 is a wasteful number, since it uses less digits than its factorization.

1387266066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77070345 (or 77070342 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1387266066 is about 37246.0208075977. The cubic root of 1387266066 is about 1115.2868656679.

The spelling of 1387266066 in words is "one billion, three hundred eighty-seven million, two hundred sixty-six thousand, sixty-six".