1381602166 has 32 divisors (see below), whose sum is σ = 2457216000. Its totient is φ = 570044832.

The previous prime is 1381602151. The next prime is 1381602179. The reversal of 1381602166 is 6612061831.

It is a happy number.

It is a super-4 number, since 4×1381602166⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141015 + ... + 150493.

It is an arithmetic number, because the mean of its divisors is an integer number (76788000).

Almost surely, 2^1381602166 is an apocalyptic number.

1381602166 is a deficient number, since it is larger than the sum of its proper divisors (1075613834).

1381602166 is a wasteful number, since it uses less digits than its factorization.

1381602166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9876.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1381602166 is about 37169.9094160855. The cubic root of 1381602166 is about 1113.7669722641.

Adding to 1381602166 its reverse (6612061831), we get a palindrome (7993663997).

The spelling of 1381602166 in words is "one billion, three hundred eighty-one million, six hundred two thousand, one hundred sixty-six".