670807808561 has 8 divisors (see below), whose sum is σ = 733633641984. Its totient is φ = 608289192720.

The previous prime is 670807808543. The next prime is 670807808579. The reversal of 670807808561 is 165808708076.

It is an interprime number because it is at equal distance from previous prime (670807808543) and next prime (670807808579).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 670807808561 - 2¹⁴ = 670807792177 is a prime.

It is a super-2 number, since 2×670807808561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670807808497 and 670807808506.

It is not an unprimeable number, because it can be changed into a prime (670807808591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76799825 + ... + 76808558.

It is an arithmetic number, because the mean of its divisors is an integer number (91704205248).

Almost surely, 2^670807808561 is an apocalyptic number.

It is an amenable number.

670807808561 is a deficient number, since it is larger than the sum of its proper divisors (62825833423).

670807808561 is a wasteful number, since it uses less digits than its factorization.

670807808561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153608791.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 670807808561 in words is "six hundred seventy billion, eight hundred seven million, eight hundred eight thousand, five hundred sixty-one".