36661020 has 48 divisors (see below), whose sum is σ = 111984768. Its totient is φ = 8887360.

The previous prime is 36660989. The next prime is 36661021. The reversal of 36661020 is 2016663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36661021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27114 + ... + 28433.

It is an arithmetic number, because the mean of its divisors is an integer number (2333016).

Almost surely, 2^36661020 is an apocalyptic number.

36661020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

36661020 is an abundant number, since it is smaller than the sum of its proper divisors (75323748).

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

36661020 is a wasteful number, since it uses less digits than its factorization.

36661020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55570 (or 55568 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 36661020 is about 6054.8344320881. The cubic root of 36661020 is about 332.2014430458.

Adding to 36661020 its reverse (2016663), we get a palindrome (38677683).

The spelling of 36661020 in words is "thirty-six million, six hundred sixty-one thousand, twenty".