366396639840 has 768 divisors, whose sum is σ = 1692896163840. Its totient is φ = 71654768640.

The previous prime is 366396639767. The next prime is 366396639877. The reversal of 366396639840 is 48936693663.

366396639840 is a `hidden beast` number, since 3 + 66 + 396 + 63 + 98 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 127 ways as a sum of consecutive naturals, for example, 5622484 + ... + 5687276.

It is an arithmetic number, because the mean of its divisors is an integer number (2204291880).

Almost surely, 2^366396639840 is an apocalyptic number.

366396639840 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 366396639840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846448081920).

366396639840 is an abundant number, since it is smaller than the sum of its proper divisors (1326499524000).

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

366396639840 is a wasteful number, since it uses less digits than its factorization.

366396639840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64852 (or 64838 counting only the distinct ones).

The product of its (nonzero) digits is 90699264, while the sum is 63.

The spelling of 366396639840 in words is "three hundred sixty-six billion, three hundred ninety-six million, six hundred thirty-nine thousand, eight hundred forty".