1686167661347 has 4 divisors (see below), whose sum is σ = 1815872866080. Its totient is φ = 1556462456616.

The previous prime is 1686167661337. The next prime is 1686167661449. The reversal of 1686167661347 is 7431667616861.

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 1686167661347 - 2⁸ = 1686167661091 is a prime.

It is a super-2 number, since 2×1686167661347² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1686167661347.

It is not an unprimeable number, because it can be changed into a prime (1686167661317) 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, 64852602347 + ... + 64852602372.

It is an arithmetic number, because the mean of its divisors is an integer number (453968216520).

Almost surely, 2^{1686167661347} is an apocalyptic number.

1686167661347 is a deficient number, since it is larger than the sum of its proper divisors (129705204733).

1686167661347 is a wasteful number, since it uses less digits than its factorization.

1686167661347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129705204732.

The product of its digits is 36578304, while the sum is 62.

The spelling of 1686167661347 in words is "one trillion, six hundred eighty-six billion, one hundred sixty-seven million, six hundred sixty-one thousand, three hundred forty-seven".