664587673477 has 16 divisors (see below), whose sum is σ = 818285894272. Its totient is φ = 525614287680.

The previous prime is 664587673439. The next prime is 664587673499. The reversal of 664587673477 is 774376785466.

664587673477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 664587673477 - 2⁷ = 664587673349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664587674477) 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, 1255674 + ... + 1704667.

It is an arithmetic number, because the mean of its divisors is an integer number (51142868392).

Almost surely, 2^664587673477 is an apocalyptic number.

It is an amenable number.

664587673477 is a deficient number, since it is larger than the sum of its proper divisors (153698220795).

664587673477 is a wasteful number, since it uses less digits than its factorization.

664587673477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962828.

The product of its digits is 995742720, while the sum is 70.

The spelling of 664587673477 in words is "six hundred sixty-four billion, five hundred eighty-seven million, six hundred seventy-three thousand, four hundred seventy-seven".