66601533 has 8 divisors (see below), whose sum is σ = 88941888. Its totient is φ = 44331104.

The previous prime is 66601523. The next prime is 66601543. The reversal of 66601533 is 33510666.

It is an interprime number because it is at equal distance from previous prime (66601523) and next prime (66601543).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66601533 - 2⁸ = 66601277 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66601533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66601523) 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, 15216 + ... + 19097.

It is an arithmetic number, because the mean of its divisors is an integer number (11117736).

Almost surely, 2^66601533 is an apocalyptic number.

It is an amenable number.

66601533 is a deficient number, since it is larger than the sum of its proper divisors (22340355).

66601533 is a wasteful number, since it uses less digits than its factorization.

66601533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34963.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 66601533 is about 8160.9762283688. The cubic root of 66601533 is about 405.3480379706.

The spelling of 66601533 in words is "sixty-six million, six hundred one thousand, five hundred thirty-three".