133651768 has 8 divisors (see below), whose sum is σ = 250597080. Its totient is φ = 66825880.

The previous prime is 133651753. The next prime is 133651787. The reversal of 133651768 is 867156331.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 133651768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8353228 + ... + 8353243.

It is an arithmetic number, because the mean of its divisors is an integer number (31324635).

Almost surely, 2^133651768 is an apocalyptic number.

It is an amenable number.

133651768 is a deficient number, since it is larger than the sum of its proper divisors (116945312).

133651768 is a wasteful number, since it uses less digits than its factorization.

133651768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16706477 (or 16706473 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 133651768 is about 11560.7857864420. The cubic root of 133651768 is about 511.2793307379.

The spelling of 133651768 in words is "one hundred thirty-three million, six hundred fifty-one thousand, seven hundred sixty-eight".