66040535 has 16 divisors (see below), whose sum is σ = 86644512. Its totient is φ = 47923200.

The previous prime is 66040531. The next prime is 66040543. The reversal of 66040535 is 53504066.

It is not a de Polignac number, because 66040535 - 2² = 66040531 is a prime.

It is a super-3 number, since 3×66040535³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66040498 and 66040507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30695 + ... + 32775.

It is an arithmetic number, because the mean of its divisors is an integer number (5415282).

Almost surely, 2^66040535 is an apocalyptic number.

66040535 is a deficient number, since it is larger than the sum of its proper divisors (20603977).

66040535 is a wasteful number, since it uses less digits than its factorization.

66040535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 66040535 is about 8126.5327784979. The cubic root of 66040535 is about 404.2067182944.

The spelling of 66040535 in words is "sixty-six million, forty thousand, five hundred thirty-five".