1166003640 has 64 divisors (see below), whose sum is σ = 3886682400. Its totient is φ = 310934016.

The previous prime is 1166003611. The next prime is 1166003687. The reversal of 1166003640 is 463006611.

1166003640 is a `hidden beast` number, since 1 + 16 + 6 + 0 + 0 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 538737 + ... + 540896.

Almost surely, 2^1166003640 is an apocalyptic number.

1166003640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166003640 is an abundant number, since it is smaller than the sum of its proper divisors (2720678760).

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

1166003640 is a wasteful number, since it uses less digits than its factorization.

1166003640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079653 (or 1079643 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1166003640 is about 34146.7954572607. The cubic root of 1166003640 is about 1052.5271373026.

The spelling of 1166003640 in words is "one billion, one hundred sixty-six million, three thousand, six hundred forty".