36661382220 has 72 divisors (see below), whose sum is σ = 107309136816. Its totient is φ = 9351300992.

The previous prime is 36661382209. The next prime is 36661382237. The reversal of 36661382220 is 2228316663.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 545787 + ... + 609266.

It is an arithmetic number, because the mean of its divisors is an integer number (1490404678).

Almost surely, 2^36661382220 is an apocalyptic number.

36661382220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

36661382220 is an abundant number, since it is smaller than the sum of its proper divisors (70647754596).

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

36661382220 is a wasteful number, since it uses less digits than its factorization.

36661382220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155111 (or 1155086 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

Adding to 36661382220 its reverse (2228316663), we get a palindrome (38889698883).

The spelling of 36661382220 in words is "thirty-six billion, six hundred sixty-one million, three hundred eighty-two thousand, two hundred twenty".