3601491660 has 480 divisors, whose sum is σ = 12885187392. Its totient is φ = 836075520.

The previous prime is 3601491653. The next prime is 3601491671. The reversal of 3601491660 is 661941063.

3601491660 is a `hidden beast` number, since 3 + 601 + 49 + 1 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 159 ways as a sum of consecutive naturals, for example, 37128732 + ... + 37128828.

Almost surely, 2^3601491660 is an apocalyptic number.

3601491660 is a gapful number since it is divisible by the number (30) 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 3601491660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6442593696).

3601491660 is an abundant number, since it is smaller than the sum of its proper divisors (9283695732).

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

3601491660 is a wasteful number, since it uses less digits than its factorization.

3601491660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3601491660 is about 60012.4292126223. The cubic root of 3601491660 is about 1532.8305157661.

The spelling of 3601491660 in words is "three billion, six hundred one million, four hundred ninety-one thousand, six hundred sixty".