66627399485577 has 32 divisors (see below), whose sum is σ = 107045358085120. Its totient is φ = 36010127931840.

The previous prime is 66627399485519. The next prime is 66627399485579. The reversal of 66627399485577 is 77558499372666.

It is not a de Polignac number, because 66627399485577 - 2¹² = 66627399481481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66627399485577.

It is not an unprimeable number, because it can be changed into a prime (66627399485579) 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, 135959299 + ... + 136448472.

It is an arithmetic number, because the mean of its divisors is an integer number (3345167440160).

Almost surely, 2^{66627399485577} is an apocalyptic number.

It is an amenable number.

66627399485577 is a deficient number, since it is larger than the sum of its proper divisors (40417958599543).

66627399485577 is a wasteful number, since it uses less digits than its factorization.

66627399485577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272408413.

The product of its digits is 28805414400, while the sum is 84.

The spelling of 66627399485577 in words is "sixty-six trillion, six hundred twenty-seven billion, three hundred ninety-nine million, four hundred eighty-five thousand, five hundred seventy-seven".