1381334566 has 8 divisors (see below), whose sum is σ = 2072490480. Its totient is φ = 690504408.

The previous prime is 1381334531. The next prime is 1381334593. The reversal of 1381334566 is 6654331831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 70546 + ... + 87973.

It is an arithmetic number, because the mean of its divisors is an integer number (259061310).

Almost surely, 2^1381334566 is an apocalyptic number.

1381334566 is a deficient number, since it is larger than the sum of its proper divisors (691155914).

1381334566 is a wasteful number, since it uses less digits than its factorization.

1381334566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162878.

The product of its digits is 155520, while the sum is 40.

The square root of 1381334566 is about 37166.3095558330. The cubic root of 1381334566 is about 1113.6950597909.

The spelling of 1381334566 in words is "one billion, three hundred eighty-one million, three hundred thirty-four thousand, five hundred sixty-six".