66541535 has 8 divisors (see below), whose sum is σ = 80269056. Its totient is φ = 52953760.

The previous prime is 66541513. The next prime is 66541537. The reversal of 66541535 is 53514566.

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

It is not a de Polignac number, because 66541535 - 2¹⁰ = 66540511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66541495 and 66541504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66541537) 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, 33884 + ... + 35793.

It is an arithmetic number, because the mean of its divisors is an integer number (10033632).

Almost surely, 2^66541535 is an apocalyptic number.

66541535 is a deficient number, since it is larger than the sum of its proper divisors (13727521).

66541535 is a wasteful number, since it uses less digits than its factorization.

66541535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69873.

The product of its digits is 54000, while the sum is 35.

The square root of 66541535 is about 8157.2994918662. The cubic root of 66541535 is about 405.2262821237.

It can be divided in two parts, 66541 and 535, that added together give a palindrome (67076).

The spelling of 66541535 in words is "sixty-six million, five hundred forty-one thousand, five hundred thirty-five".