366991220736 has 672 divisors, whose sum is σ = 1295457546240. Its totient is φ = 97827028992.

The previous prime is 366991220731. The next prime is 366991220737. The reversal of 366991220736 is 637022199663.

366991220736 is a `hidden beast` number, since 366 + 99 + 122 + 0 + 73 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is not an unprimeable number, because it can be changed into a prime (366991220731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 510418585 + ... + 510419303.

Almost surely, 2^366991220736 is an apocalyptic number.

366991220736 is a gapful number since it is divisible by the number (36) 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 366991220736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647728773120).

366991220736 is an abundant number, since it is smaller than the sum of its proper divisors (928466325504).

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

366991220736 is a wasteful number, since it uses less digits than its factorization.

366991220736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The spelling of 366991220736 in words is "three hundred sixty-six billion, nine hundred ninety-one million, two hundred twenty thousand, seven hundred thirty-six".