3666780 has 72 divisors (see below), whose sum is σ = 11985792. Its totient is φ = 902016.

The previous prime is 3666757. The next prime is 3666787. The reversal of 3666780 is 876663.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1557 + ... + 3123.

Almost surely, 2^3666780 is an apocalyptic number.

3666780 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 3666780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5992896).

3666780 is an abundant number, since it is smaller than the sum of its proper divisors (8319012).

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

3666780 is a wasteful number, since it uses less digits than its factorization.

3666780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 3666780 is about 1914.8838084855. The cubic root of 3666780 is about 154.2037557060.

The spelling of 3666780 in words is "three million, six hundred sixty-six thousand, seven hundred eighty".