1660611131 has 8 divisors (see below), whose sum is σ = 1716793728. Its totient is φ = 1604592000.

The previous prime is 1660611083. The next prime is 1660611143. The reversal of 1660611131 is 1311160661.

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 1660611131 - 2⁶ = 1660611067 is a prime.

It is a super-2 number, since 2×1660611131² = 5515258656802198322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660611131.

It is not an unprimeable number, because it can be changed into a prime (1660611331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20030 + ... + 61011.

It is an arithmetic number, because the mean of its divisors is an integer number (214599216).

Almost surely, 2^1660611131 is an apocalyptic number.

1660611131 is a deficient number, since it is larger than the sum of its proper divisors (56182597).

1660611131 is an equidigital number, since it uses as much as digits as its factorization.

1660611131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81733.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1660611131 is about 40750.5966950179. The cubic root of 1660611131 is about 1184.1934326328.

Adding to 1660611131 its reverse (1311160661), we get a palindrome (2971771792).

The spelling of 1660611131 in words is "one billion, six hundred sixty million, six hundred eleven thousand, one hundred thirty-one".