3666263640 has 128 divisors (see below), whose sum is σ = 11962641600. Its totient is φ = 893491200.

The previous prime is 3666263603. The next prime is 3666263669. The reversal of 3666263640 is 463626663.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3666263592 and 3666263601.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 145926 + ... + 169194.

Almost surely, 2^3666263640 is an apocalyptic number.

3666263640 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 3666263640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5981320800).

3666263640 is an abundant number, since it is smaller than the sum of its proper divisors (8296377960).

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

3666263640 is a wasteful number, since it uses less digits than its factorization.

3666263640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23397 (or 23393 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 42.

The square root of 3666263640 is about 60549.6791073248. The cubic root of 3666263640 is about 1541.9651698526.

The spelling of 3666263640 in words is "three billion, six hundred sixty-six million, two hundred sixty-three thousand, six hundred forty".