664787111087 has 8 divisors (see below), whose sum is σ = 725228366592. Its totient is φ = 604346866200.

The previous prime is 664787111083. The next prime is 664787111101. The reversal of 664787111087 is 780111787466.

664787111087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 664787111087 - 2² = 664787111083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664787111083) 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, 1982618 + ... + 2293544.

It is an arithmetic number, because the mean of its divisors is an integer number (90653545824).

Almost surely, 2^664787111087 is an apocalyptic number.

664787111087 is a deficient number, since it is larger than the sum of its proper divisors (60441255505).

664787111087 is a wasteful number, since it uses less digits than its factorization.

664787111087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505309.

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 664787111087 in words is "six hundred sixty-four billion, seven hundred eighty-seven million, one hundred eleven thousand, eighty-seven".