66040653 has 8 divisors (see below), whose sum is σ = 100633408. Its totient is φ = 37737504.

The previous prime is 66040619. The next prime is 66040657. The reversal of 66040653 is 35604066.

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

It is not a de Polignac number, because 66040653 - 2⁶ = 66040589 is a prime.

It is a super-2 number, since 2×66040653² = 8722735697332818, which contains 22 as substring.

It is a Duffinian number.

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 66040653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040657) 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, 1572376 + ... + 1572417.

It is an arithmetic number, because the mean of its divisors is an integer number (12579176).

Almost surely, 2^66040653 is an apocalyptic number.

It is an amenable number.

66040653 is a deficient number, since it is larger than the sum of its proper divisors (34592755).

66040653 is a wasteful number, since it uses less digits than its factorization.

66040653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144803.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66040653 is about 8126.5400386634. The cubic root of 66040653 is about 404.2069590373.

The spelling of 66040653 in words is "sixty-six million, forty thousand, six hundred fifty-three".