670626677909 has 4 divisors (see below), whose sum is σ = 670698851916. Its totient is φ = 670554503904.

The previous prime is 670626677869. The next prime is 670626677923. The reversal of 670626677909 is 909776626076.

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

It can be written as a sum of positive squares in 2 ways, for example, as 139462661809 + 531164016100 = 373447^2 + 728810^2 .

It is a cyclic number.

It is not a de Polignac number, because 670626677909 - 2¹⁶ = 670626612373 is a prime.

It is a super-2 number, since 2×670626677909² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670626677939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36073064 + ... + 36091649.

It is an arithmetic number, because the mean of its divisors is an integer number (167674712979).

Almost surely, 2^670626677909 is an apocalyptic number.

It is an amenable number.

670626677909 is a deficient number, since it is larger than the sum of its proper divisors (72174007).

670626677909 is an equidigital number, since it uses as much as digits as its factorization.

670626677909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72174006.

The product of its (nonzero) digits is 72013536, while the sum is 65.

The spelling of 670626677909 in words is "six hundred seventy billion, six hundred twenty-six million, six hundred seventy-seven thousand, nine hundred nine".