36665638 has 16 divisors (see below), whose sum is σ = 56232000. Its totient is φ = 17926272.

The previous prime is 36665633. The next prime is 36665641. The reversal of 36665638 is 83656663.

It is a junction number, because it is equal to n+sod(n) for n = 36665594 and 36665603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36665633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16158 + ... + 18286.

It is an arithmetic number, because the mean of its divisors is an integer number (3514500).

Almost surely, 2^36665638 is an apocalyptic number.

36665638 is a deficient number, since it is larger than the sum of its proper divisors (19566362).

36665638 is a wasteful number, since it uses less digits than its factorization.

36665638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319.

The product of its digits is 466560, while the sum is 43.

The square root of 36665638 is about 6055.2157682448. The cubic root of 36665638 is about 332.2153910288.

Subtracting 36665638 from its reverse (83656663), we obtain a square (46991025 = 6855²).

The spelling of 36665638 in words is "thirty-six million, six hundred sixty-five thousand, six hundred thirty-eight".