366640000 has 80 divisors (see below), whose sum is σ = 912926520. Its totient is φ = 146624000.

The previous prime is 366639989. The next prime is 366640009. The reversal of 366640000 is 46663.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366640009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77709 + ... + 82291.

Almost surely, 2^366640000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 366640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456463260).

366640000 is an abundant number, since it is smaller than the sum of its proper divisors (546286520).

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

366640000 is an frugal number, since it uses more digits than its factorization.

366640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617 (or 4590 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 366640000 is about 19147.8458318423. The cubic root of 366640000 is about 715.7257045722.

Adding to 366640000 its reverse (46663), we get a palindrome (366686663).

The spelling of 366640000 in words is "three hundred sixty-six million, six hundred forty thousand".