670691186647 has 2 divisors, whose sum is σ = 670691186648. Its totient is φ = 670691186646.

The previous prime is 670691186447. The next prime is 670691186713. The reversal of 670691186647 is 746681196076.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670691186647 is a prime.

It is a super-2 number, since 2×670691186647² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670691186447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335345593323 + 335345593324.

It is an arithmetic number, because the mean of its divisors is an integer number (335345593324).

Almost surely, 2^670691186647 is an apocalyptic number.

670691186647 is a deficient number, since it is larger than the sum of its proper divisors (1).

670691186647 is an equidigital number, since it uses as much as digits as its factorization.

670691186647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 670691186647 in words is "six hundred seventy billion, six hundred ninety-one million, one hundred eighty-six thousand, six hundred forty-seven".