1381066567 has 4 divisors (see below), whose sum is σ = 1388006800. Its totient is φ = 1374126336.

The previous prime is 1381066543. The next prime is 1381066571. The reversal of 1381066567 is 7656601831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1381066567 - 2¹⁵ = 1381033799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381061567) 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, 3469818 + ... + 3470215.

It is an arithmetic number, because the mean of its divisors is an integer number (347001700).

Almost surely, 2^1381066567 is an apocalyptic number.

1381066567 is a deficient number, since it is larger than the sum of its proper divisors (6940233).

1381066567 is an equidigital number, since it uses as much as digits as its factorization.

1381066567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940232.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1381066567 is about 37162.7039785858. The cubic root of 1381066567 is about 1113.6230307850.

The spelling of 1381066567 in words is "one billion, three hundred eighty-one million, sixty-six thousand, five hundred sixty-seven".