3666981540 has 96 divisors (see below), whose sum is σ = 10734425856. Its totient is φ = 933560320.

The previous prime is 3666981523. The next prime is 3666981553. The reversal of 3666981540 is 451896663.

It is a super-2 number, since 2×3666981540² = 26893507229401543200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3666981540.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816100 + ... + 820580.

It is an arithmetic number, because the mean of its divisors is an integer number (111816936).

Almost surely, 2^3666981540 is an apocalyptic number.

3666981540 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 3666981540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5367212928).

3666981540 is an abundant number, since it is smaller than the sum of its proper divisors (7067444316).

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

3666981540 is a wasteful number, since it uses less digits than its factorization.

3666981540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109 (or 5107 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 3666981540 is about 60555.6070071137. The cubic root of 3666981540 is about 1542.0658086008.

The spelling of 3666981540 in words is "three billion, six hundred sixty-six million, nine hundred eighty-one thousand, five hundred forty".