1001660600 has 72 divisors (see below), whose sum is σ = 2360499960. Its totient is φ = 395292480.

The previous prime is 1001660599. The next prime is 1001660617. The reversal of 1001660600 is 60661001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1377437 + ... + 1378163.

Almost surely, 2^1001660600 is an apocalyptic number.

1001660600 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 1001660600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180249980).

1001660600 is an abundant number, since it is smaller than the sum of its proper divisors (1358839360).

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

1001660600 is an equidigital number, since it uses as much as digits as its factorization.

1001660600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1001660600 is about 31649.0221017964. The cubic root of 1001660600 is about 1000.5532272165.

The spelling of 1001660600 in words is "one billion, one million, six hundred sixty thousand, six hundred".