133661376 has 42 divisors (see below), whose sum is σ = 383117852. Its totient is φ = 44553600.

The previous prime is 133661369. The next prime is 133661383. The reversal of 133661376 is 673166331.

133661376 is a `hidden beast` number, since 1 + 3 + 36 + 613 + 7 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (133661369) and next prime (133661383).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 133661376.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115450 + ... + 116601.

Almost surely, 2^133661376 is an apocalyptic number.

133661376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133661376 is an abundant number, since it is smaller than the sum of its proper divisors (249456476).

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

133661376 is a wasteful number, since it uses less digits than its factorization.

133661376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232069 (or 232056 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 133661376 is about 11561.2013216620. The cubic root of 133661376 is about 511.2915821137.

The spelling of 133661376 in words is "one hundred thirty-three million, six hundred sixty-one thousand, three hundred seventy-six".