3661677440 has 32 divisors (see below), whose sum is σ = 8753699160. Its totient is φ = 1464670720.

The previous prime is 3661677433. The next prime is 3661677443. The reversal of 3661677440 is 447761663.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 3661677391 and 3661677400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661677443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860046 + ... + 2861325.

Almost surely, 2^3661677440 is an apocalyptic number.

It is an amenable number.

3661677440 is an abundant number, since it is smaller than the sum of its proper divisors (5092021720).

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

3661677440 is an equidigital number, since it uses as much as digits as its factorization.

3661677440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721390 (or 5721378 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 3661677440 is about 60511.7958748540. The cubic root of 3661677440 is about 1541.3219435654.

The spelling of 3661677440 in words is "three billion, six hundred sixty-one million, six hundred seventy-seven thousand, four hundred forty".