133615660 has 24 divisors (see below), whose sum is σ = 281153376. Its totient is φ = 53339520.

The previous prime is 133615649. The next prime is 133615661. The reversal of 133615660 is 66516331.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (133615661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4009 + ... + 16831.

It is an arithmetic number, because the mean of its divisors is an integer number (11714724).

Almost surely, 2^133615660 is an apocalyptic number.

133615660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133615660 is an abundant number, since it is smaller than the sum of its proper divisors (147537716).

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

133615660 is a wasteful number, since it uses less digits than its factorization.

133615660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13353 (or 13351 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 133615660 is about 11559.2240223987. The cubic root of 133615660 is about 511.2332833689.

The spelling of 133615660 in words is "one hundred thirty-three million, six hundred fifteen thousand, six hundred sixty".