66600535 has 8 divisors (see below), whose sum is σ = 79987536. Its totient is φ = 53235840.

The previous prime is 66600503. The next prime is 66600539. The reversal of 66600535 is 53500666.

It is a happy number.

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

It is not a de Polignac number, because 66600535 - 2⁵ = 66600503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66600497 and 66600506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912 + ... + 11698.

It is an arithmetic number, because the mean of its divisors is an integer number (9998442).

Almost surely, 2^66600535 is an apocalyptic number.

66600535 is a deficient number, since it is larger than the sum of its proper divisors (13387001).

66600535 is a wasteful number, since it uses less digits than its factorization.

66600535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11153.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 66600535 is about 8160.9150834940. The cubic root of 66600535 is about 405.3460132956.

The spelling of 66600535 in words is "sixty-six million, six hundred thousand, five hundred thirty-five".