1186420008665 has 16 divisors (see below), whose sum is σ = 1428323295168. Its totient is φ = 946061430336.

The previous prime is 1186420008661. The next prime is 1186420008677. The reversal of 1186420008665 is 5668000246811.

It is a cyclic number.

It is not a de Polignac number, because 1186420008665 - 2² = 1186420008661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1186420008661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614107 + ... + 2231183.

It is an arithmetic number, because the mean of its divisors is an integer number (89270205948).

Almost surely, 2^{1186420008665} is an apocalyptic number.

It is an amenable number.

1186420008665 is a deficient number, since it is larger than the sum of its proper divisors (241903286503).

1186420008665 is an equidigital number, since it uses as much as digits as its factorization.

1186420008665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618328.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 1186420008665 in words is "one trillion, one hundred eighty-six billion, four hundred twenty million, eight thousand, six hundred sixty-five".