1375646166 has 20 divisors (see below), whose sum is σ = 3082466772. Its totient is φ = 458548668.

The previous prime is 1375646141. The next prime is 1375646201. The reversal of 1375646166 is 6616465731.

1375646166 is a `hidden beast` number, since 137 + 56 + 461 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4245660 + ... + 4245983.

Almost surely, 2^1375646166 is an apocalyptic number.

1375646166 is an abundant number, since it is smaller than the sum of its proper divisors (1706820606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1375646166 is an equidigital number, since it uses as much as digits as its factorization.

1375646166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491657 (or 8491648 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 1375646166 is about 37089.7043126526. The cubic root of 1375646166 is about 1112.1642071353.

The spelling of 1375646166 in words is "one billion, three hundred seventy-five million, six hundred forty-six thousand, one hundred sixty-six".