1681366027 has 18 divisors (see below), whose sum is σ = 1863076236. Its totient is φ = 1516232520.

The previous prime is 1681365991. The next prime is 1681366051. The reversal of 1681366027 is 7206631861.

It is a happy number.

It is not a de Polignac number, because 1681366027 - 2¹⁵ = 1681333259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1681366097) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3214588 + ... + 3215110.

Almost surely, 2^1681366027 is an apocalyptic number.

1681366027 is a deficient number, since it is larger than the sum of its proper divisors (181710209).

1681366027 is an equidigital number, since it uses as much as digits as its factorization.

1681366027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1681366027 is about 41004.4635009410. The cubic root of 1681366027 is about 1189.1065079401.

Adding to 1681366027 its reverse (7206631861), we get a palindrome (8887997888).

The spelling of 1681366027 in words is "one billion, six hundred eighty-one million, three hundred sixty-six thousand, twenty-seven".