66547488279 has 8 divisors (see below), whose sum is σ = 89194540032. Its totient is φ = 44132714360.

The previous prime is 66547488247. The next prime is 66547488281. The reversal of 66547488279 is 97288474566.

It is a happy number.

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 66547488279 - 2⁵ = 66547488247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66547488289) 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, 58068789 + ... + 58069934.

It is an arithmetic number, because the mean of its divisors is an integer number (11149317504).

Almost surely, 2^66547488279 is an apocalyptic number.

66547488279 is a deficient number, since it is larger than the sum of its proper divisors (22647051753).

66547488279 is a wasteful number, since it uses less digits than its factorization.

66547488279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116138917.

The product of its digits is 162570240, while the sum is 66.

The spelling of 66547488279 in words is "sixty-six billion, five hundred forty-seven million, four hundred eighty-eight thousand, two hundred seventy-nine".