1191096660 has 48 divisors (see below), whose sum is σ = 3591616896. Its totient is φ = 293192832.

The previous prime is 1191096623. The next prime is 1191096691. The reversal of 1191096660 is 666901911.

It is a super-2 number, since 2×1191096660² = 2837422506926311200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762744 + ... + 764303.

It is an arithmetic number, because the mean of its divisors is an integer number (74825352).

Almost surely, 2^1191096660 is an apocalyptic number.

1191096660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191096660 is an abundant number, since it is smaller than the sum of its proper divisors (2400520236).

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

1191096660 is a wasteful number, since it uses less digits than its factorization.

1191096660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527072 (or 1527070 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1191096660 is about 34512.2682534776. The cubic root of 1191096660 is about 1060.0239284974.

The spelling of 1191096660 in words is "one billion, one hundred ninety-one million, ninety-six thousand, six hundred sixty".