66420654452273 has 8 divisors (see below), whose sum is σ = 74143986365856. Its totient is φ = 58978170972000.

The previous prime is 66420654452261. The next prime is 66420654452281. The reversal of 66420654452273 is 37225445602466.

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

It is a cyclic number.

It is not a de Polignac number, because 66420654452273 - 2¹⁸ = 66420654190129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66420654452233) 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, 70212107828 + ... + 70212108773.

It is an arithmetic number, because the mean of its divisors is an integer number (9267998295732).

Almost surely, 2^{66420654452273} is an apocalyptic number.

It is an amenable number.

66420654452273 is a deficient number, since it is larger than the sum of its proper divisors (7723331913583).

66420654452273 is a wasteful number, since it uses less digits than its factorization.

66420654452273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140424216655.

The product of its (nonzero) digits is 58060800, while the sum is 56.

The spelling of 66420654452273 in words is "sixty-six trillion, four hundred twenty billion, six hundred fifty-four million, four hundred fifty-two thousand, two hundred seventy-three".