1166277640 has 64 divisors (see below), whose sum is σ = 2881085760. Its totient is φ = 421374720.

The previous prime is 1166277613. The next prime is 1166277641. The reversal of 1166277640 is 467726611.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1166277593 and 1166277602.

It is not an unprimeable number, because it can be changed into a prime (1166277641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60639 + ... + 77521.

It is an arithmetic number, because the mean of its divisors is an integer number (45016965).

Almost surely, 2^1166277640 is an apocalyptic number.

1166277640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166277640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440542880).

1166277640 is an abundant number, since it is smaller than the sum of its proper divisors (1714808120).

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

1166277640 is a wasteful number, since it uses less digits than its factorization.

1166277640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17062 (or 17058 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 1166277640 is about 34150.8073111017. The cubic root of 1166277640 is about 1052.6095755383.

The spelling of 1166277640 in words is "one billion, one hundred sixty-six million, two hundred seventy-seven thousand, six hundred forty".