671065648785 has 48 divisors (see below), whose sum is σ = 1330293444480. Its totient is φ = 306554941440.

The previous prime is 671065648763. The next prime is 671065648807. The reversal of 671065648785 is 587846560176.

671065648785 is a `hidden beast` number, since 6 + 7 + 10 + 65 + 6 + 487 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (671065648763) and next prime (671065648807).

It is not a de Polignac number, because 671065648785 - 2⁵ = 671065648753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312151 + ... + 1199820.

It is an arithmetic number, because the mean of its divisors is an integer number (27714446760).

Almost surely, 2^671065648785 is an apocalyptic number.

It is an amenable number.

671065648785 is a deficient number, since it is larger than the sum of its proper divisors (659227795695).

671065648785 is a wasteful number, since it uses less digits than its factorization.

671065648785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513398 (or 1513395 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 63.

The spelling of 671065648785 in words is "six hundred seventy-one billion, sixty-five million, six hundred forty-eight thousand, seven hundred eighty-five".