1011611660 has 24 divisors (see below), whose sum is σ = 2138648400. Its totient is φ = 401927744.

The previous prime is 1011611609. The next prime is 1011611663. The reversal of 1011611660 is 661161101.

1011611660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1011611663) 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, 166754 + ... + 172713.

It is an arithmetic number, because the mean of its divisors is an integer number (89110350).

Almost surely, 2^1011611660 is an apocalyptic number.

1011611660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011611660 is an abundant number, since it is smaller than the sum of its proper divisors (1127036740).

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

1011611660 is a wasteful number, since it uses less digits than its factorization.

1011611660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339625 (or 339623 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1011611660 is about 31805.8431738572. The cubic root of 1011611660 is about 1003.8556680509.

Adding to 1011611660 its reverse (661161101), we get a palindrome (1672772761).

The spelling of 1011611660 in words is "one billion, eleven million, six hundred eleven thousand, six hundred sixty".