664455704723085 has 16 divisors (see below), whose sum is σ = 1159777230062400. Its totient is φ = 322160341683840.

The previous prime is 664455704722973. The next prime is 664455704723087. The reversal of 664455704723085 is 580327407554466.

It is not a de Polignac number, because 664455704723085 - 2⁹ = 664455704722573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664455704723087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2013502135360 + ... + 2013502135689.

It is an arithmetic number, because the mean of its divisors is an integer number (72486076878900).

Almost surely, 2^{664455704723085} is an apocalyptic number.

It is an amenable number.

664455704723085 is a deficient number, since it is larger than the sum of its proper divisors (495321525339315).

664455704723085 is a wasteful number, since it uses less digits than its factorization.

664455704723085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027004271068.

The product of its (nonzero) digits is 677376000, while the sum is 66.

The spelling of 664455704723085 in words is "six hundred sixty-four trillion, four hundred fifty-five billion, seven hundred four million, seven hundred twenty-three thousand, eighty-five".