66611050653 has 24 divisors (see below), whose sum is σ = 104338044000. Its totient is φ = 37686583200.

The previous prime is 66611050633. The next prime is 66611050663. The reversal of 66611050653 is 35605011666.

It is not a de Polignac number, because 66611050653 - 2⁶ = 66611050589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66611050633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2228403 + ... + 2258096.

It is an arithmetic number, because the mean of its divisors is an integer number (4347418500).

Almost surely, 2^66611050653 is an apocalyptic number.

It is an amenable number.

66611050653 is a deficient number, since it is larger than the sum of its proper divisors (37726993347).

66611050653 is a wasteful number, since it uses less digits than its factorization.

66611050653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486617 (or 4486610 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 66611050653 in words is "sixty-six billion, six hundred eleven million, fifty thousand, six hundred fifty-three".