36661521 has 16 divisors (see below), whose sum is σ = 52811136. Its totient is φ = 22488576.

The previous prime is 36661519. The next prime is 36661543. The reversal of 36661521 is 12516663.

It is not a de Polignac number, because 36661521 - 2¹ = 36661519 is a prime.

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, 12436 + ... + 15098.

It is an arithmetic number, because the mean of its divisors is an integer number (3300696).

Almost surely, 2^36661521 is an apocalyptic number.

It is an amenable number.

36661521 is a deficient number, since it is larger than the sum of its proper divisors (16149615).

36661521 is a wasteful number, since it uses less digits than its factorization.

36661521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032.

The product of its digits is 6480, while the sum is 30.

The square root of 36661521 is about 6054.8758038460. The cubic root of 36661521 is about 332.2029562985.

The spelling of 36661521 in words is "thirty-six million, six hundred sixty-one thousand, five hundred twenty-one".