664759061269 has 8 divisors (see below), whose sum is σ = 675691697408. Its totient is φ = 653827552560.

The previous prime is 664759061237. The next prime is 664759061299. The reversal of 664759061269 is 962160957466.

664759061269 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 a cyclic number.

It is not a de Polignac number, because 664759061269 - 2⁵ = 664759061237 is a prime.

It is a super-2 number, since 2×664759061269² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664759061299) 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, 951064 + ... + 1494670.

It is an arithmetic number, because the mean of its divisors is an integer number (84461462176).

Almost surely, 2^664759061269 is an apocalyptic number.

It is an amenable number.

664759061269 is a deficient number, since it is larger than the sum of its proper divisors (10932636139).

664759061269 is a wasteful number, since it uses less digits than its factorization.

664759061269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563715.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 664759061269 in words is "six hundred sixty-four billion, seven hundred fifty-nine million, sixty-one thousand, two hundred sixty-nine".