66020202646607 has 32 divisors (see below), whose sum is σ = 72432062714880. Its totient is φ = 59677605272320.

The previous prime is 66020202646589. The next prime is 66020202646621. The reversal of 66020202646607 is 70664620202066.

It is a cyclic number.

It is not a de Polignac number, because 66020202646607 - 2²⁰ = 66020201598031 is a prime.

It is a super-2 number, since 2×66020202646607² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020202646687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10431376619 + ... + 10431382947.

It is an arithmetic number, because the mean of its divisors is an integer number (2263501959840).

Almost surely, 2^{66020202646607} is an apocalyptic number.

66020202646607 is a deficient number, since it is larger than the sum of its proper divisors (6411860068273).

66020202646607 is a wasteful number, since it uses less digits than its factorization.

66020202646607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12823.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 66020202646607 in words is "sixty-six trillion, twenty billion, two hundred two million, six hundred forty-six thousand, six hundred seven".