664429787307 has 108 divisors (see below), whose sum is σ = 1172659834920. Its totient is φ = 371370130560.

The previous prime is 664429787297. The next prime is 664429787339. The reversal of 664429787307 is 703787924466.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 664429787307 - 2⁴ = 664429787291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664429787807) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 605678383 + ... + 605679479.

Almost surely, 2^664429787307 is an apocalyptic number.

664429787307 is a deficient number, since it is larger than the sum of its proper divisors (508230047613).

664429787307 is a wasteful number, since it uses less digits than its factorization.

664429787307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 85349376, while the sum is 63.

The spelling of 664429787307 in words is "six hundred sixty-four billion, four hundred twenty-nine million, seven hundred eighty-seven thousand, three hundred seven".