1375440166 has 4 divisors (see below), whose sum is σ = 2063160252. Its totient is φ = 687720082.

The previous prime is 1375440163. The next prime is 1375440193. The reversal of 1375440166 is 6610445731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6610445731 = 409 ⋅16162459.

It is a super-2 number, since 2×1375440166² = 3783671300492215112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375440163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343860040 + ... + 343860043.

It is an arithmetic number, because the mean of its divisors is an integer number (515790063).

Almost surely, 2^1375440166 is an apocalyptic number.

1375440166 is a deficient number, since it is larger than the sum of its proper divisors (687720086).

1375440166 is an equidigital number, since it uses as much as digits as its factorization.

1375440166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687720085.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1375440166 is about 37086.9271576926. The cubic root of 1375440166 is about 1112.1086896461.

Adding to 1375440166 its reverse (6610445731), we get a palindrome (7985885897).

The spelling of 1375440166 in words is "one billion, three hundred seventy-five million, four hundred forty thousand, one hundred sixty-six".