36666663 has 16 divisors (see below), whose sum is σ = 53568000. Its totient is φ = 22124480.

The previous prime is 36666649. The next prime is 36666683.

36666663 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 36666663 - 2⁴ = 36666647 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36666683) 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, 5563 + ... + 10211.

It is an arithmetic number, because the mean of its divisors is an integer number (3348000).

Almost surely, 2^36666663 is an apocalyptic number.

36666663 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

36666663 is a deficient number, since it is larger than the sum of its proper divisors (16901337).

36666663 is a wasteful number, since it uses less digits than its factorization.

36666663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902.

The product of its digits is 419904, while the sum is 42.

The square root of 36666663 is about 6055.3004054299. The cubic root of 36666663 is about 332.2184867302.

It can be divided in two parts, 3 and 6666663, that added together give a palindrome (6666666).

The spelling of 36666663 in words is "thirty-six million, six hundred sixty-six thousand, six hundred sixty-three".