664562625774 has 16 divisors (see below), whose sum is σ = 1332688594512. Its totient is φ = 220926984768.

The previous prime is 664562625773. The next prime is 664562625781. The reversal of 664562625774 is 477526265466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664562625773) 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, 148470199 + ... + 148474674.

It is an arithmetic number, because the mean of its divisors is an integer number (83293037157).

Almost surely, 2^664562625774 is an apocalyptic number.

664562625774 is an abundant number, since it is smaller than the sum of its proper divisors (668125968738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664562625774 is a wasteful number, since it uses less digits than its factorization.

664562625774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296945251.

The product of its digits is 101606400, while the sum is 60.

The spelling of 664562625774 in words is "six hundred sixty-four billion, five hundred sixty-two million, six hundred twenty-five thousand, seven hundred seventy-four".