1065616660 has 24 divisors (see below), whose sum is σ = 2259955656. Its totient is φ = 422025600.

The previous prime is 1065616649. The next prime is 1065616663. The reversal of 1065616660 is 666165601.

It can be written as a sum of positive squares in 4 ways, for example, as 295221124 + 770395536 = 17182^2 + 27756^2 .

It is a super-2 number, since 2×1065616660² = 2271077732139111200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065616663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261747 + ... + 265786.

It is an arithmetic number, because the mean of its divisors is an integer number (94164819).

Almost surely, 2^1065616660 is an apocalyptic number.

1065616660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065616660 is an abundant number, since it is smaller than the sum of its proper divisors (1194338996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1065616660 is a wasteful number, since it uses less digits than its factorization.

1065616660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527643 (or 527641 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1065616660 is about 32643.7844007094. The cubic root of 1065616660 is about 1021.4105372839.

The spelling of 1065616660 in words is "one billion, sixty-five million, six hundred sixteen thousand, six hundred sixty".