786644661067 has 4 divisors (see below), whose sum is σ = 786681385000. Its totient is φ = 786607937136.

The previous prime is 786644661059. The next prime is 786644661071. The reversal of 786644661067 is 760166446687.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 786644661067 - 2³ = 786644661059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 786644660996 and 786644661014.

It is not an unprimeable number, because it can be changed into a prime (786644661007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18329817 + ... + 18372682.

It is an arithmetic number, because the mean of its divisors is an integer number (196670346250).

Almost surely, 2^786644661067 is an apocalyptic number.

786644661067 is a deficient number, since it is larger than the sum of its proper divisors (36723933).

786644661067 is a wasteful number, since it uses less digits than its factorization.

786644661067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36723932.

The product of its (nonzero) digits is 48771072, while the sum is 61.

The spelling of 786644661067 in words is "seven hundred eighty-six billion, six hundred forty-four million, six hundred sixty-one thousand, sixty-seven".