1667580857661 has 8 divisors (see below), whose sum is σ = 2245455412704. Its totient is φ = 1100713437200.

The previous prime is 1667580857653. The next prime is 1667580857729.

1667580857661 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1667580857661 - 2³ = 1667580857653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1667580857592 and 1667580857601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667580857561) 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 7 ways as a sum of consecutive naturals, for example, 2751783291 + ... + 2751783896.

It is an arithmetic number, because the mean of its divisors is an integer number (280681926588).

Almost surely, 2^{1667580857661} is an apocalyptic number.

It is an amenable number.

1667580857661 is a deficient number, since it is larger than the sum of its proper divisors (577874555043).

1667580857661 is a wasteful number, since it uses less digits than its factorization.

1667580857661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503567291.

The product of its (nonzero) digits is 101606400, while the sum is 66.

The spelling of 1667580857661 in words is "one trillion, six hundred sixty-seven billion, five hundred eighty million, eight hundred fifty-seven thousand, six hundred sixty-one".