36671681 has 4 divisors (see below), whose sum is σ = 36836352. Its totient is φ = 36507012.

The previous prime is 36671617. The next prime is 36671693. The reversal of 36671681 is 18617663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36671681 - 2⁶ = 36671617 is a prime.

It is a super-2 number, since 2×36671681² = 2689624374731522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36671611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82001 + ... + 82446.

It is an arithmetic number, because the mean of its divisors is an integer number (9209088).

Almost surely, 2^36671681 is an apocalyptic number.

It is an amenable number.

36671681 is a deficient number, since it is larger than the sum of its proper divisors (164671).

36671681 is a wasteful number, since it uses less digits than its factorization.

36671681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164670.

The product of its digits is 36288, while the sum is 38.

The square root of 36671681 is about 6055.7147389883. The cubic root of 36671681 is about 332.2336412438.

The spelling of 36671681 in words is "thirty-six million, six hundred seventy-one thousand, six hundred eighty-one".