1375664671 has 4 divisors (see below), whose sum is σ = 1383902352. Its totient is φ = 1367426992.

The previous prime is 1375664663. The next prime is 1375664681. The reversal of 1375664671 is 1764665731.

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 1375664671 - 2³ = 1375664663 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 (1375664611) 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, 4118590 + ... + 4118923.

It is an arithmetic number, because the mean of its divisors is an integer number (345975588).

Almost surely, 2^1375664671 is an apocalyptic number.

1375664671 is a deficient number, since it is larger than the sum of its proper divisors (8237681).

1375664671 is an equidigital number, since it uses as much as digits as its factorization.

1375664671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237680.

The product of its digits is 635040, while the sum is 46.

The square root of 1375664671 is about 37089.9537745735. The cubic root of 1375664671 is about 1112.1691940054.

The spelling of 1375664671 in words is "one billion, three hundred seventy-five million, six hundred sixty-four thousand, six hundred seventy-one".