670546687861 has 4 divisors (see below), whose sum is σ = 670622834592. Its totient is φ = 670470541132.

The previous prime is 670546687823. The next prime is 670546687901. The reversal of 670546687861 is 168786645076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 670546687861 - 2²³ = 670538299253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670546687793 and 670546687802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670546687801) 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, 38060155 + ... + 38077768.

It is an arithmetic number, because the mean of its divisors is an integer number (167655708648).

Almost surely, 2^670546687861 is an apocalyptic number.

It is an amenable number.

670546687861 is a deficient number, since it is larger than the sum of its proper divisors (76146731).

670546687861 is an equidigital number, since it uses as much as digits as its factorization.

670546687861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76146730.

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 670546687861 in words is "six hundred seventy billion, five hundred forty-six million, six hundred eighty-seven thousand, eight hundred sixty-one".