66565006653 has 16 divisors (see below), whose sum is σ = 91823097600. Its totient is φ = 42842103360.

The previous prime is 66565006631. The next prime is 66565006663. The reversal of 66565006653 is 35660056566.

It is not a de Polignac number, because 66565006653 - 2⁶ = 66565006589 is a prime.

It is a super-2 number, since 2×66565006653² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66565006663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978108 + ... + 1043946.

It is an arithmetic number, because the mean of its divisors is an integer number (5738943600).

Almost surely, 2^66565006653 is an apocalyptic number.

It is an amenable number.

66565006653 is a deficient number, since it is larger than the sum of its proper divisors (25258090947).

66565006653 is a wasteful number, since it uses less digits than its factorization.

66565006653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77492.

The product of its (nonzero) digits is 2916000, while the sum is 48.

The spelling of 66565006653 in words is "sixty-six billion, five hundred sixty-five million, six thousand, six hundred fifty-three".