133161664 has 14 divisors (see below), whose sum is σ = 264242804. Its totient is φ = 66580800.

The previous prime is 133161653. The next prime is 133161667. The reversal of 133161664 is 466161331.

It is not an unprimeable number, because it can be changed into a prime (133161667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040262 + ... + 1040389.

It is an arithmetic number, because the mean of its divisors is an integer number (18874486).

Almost surely, 2^133161664 is an apocalyptic number.

It is an amenable number.

133161664 is a deficient number, since it is larger than the sum of its proper divisors (131081140).

133161664 is an equidigital number, since it uses as much as digits as its factorization.

133161664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080663 (or 2080653 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 133161664 is about 11539.5694893700. The cubic root of 133161664 is about 510.6536077151.

The spelling of 133161664 in words is "one hundred thirty-three million, one hundred sixty-one thousand, six hundred sixty-four".