36642661 has 4 divisors (see below), whose sum is σ = 39973824. Its totient is φ = 33311500.

The previous prime is 36642647. The next prime is 36642677. The reversal of 36642661 is 16624663.

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 36642661 - 2⁷ = 36642533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36642601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665565 + ... + 1665586.

It is an arithmetic number, because the mean of its divisors is an integer number (9993456).

Almost surely, 2^36642661 is an apocalyptic number.

It is an amenable number.

36642661 is a deficient number, since it is larger than the sum of its proper divisors (3331163).

36642661 is a wasteful number, since it uses less digits than its factorization.

36642661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331162.

The product of its digits is 31104, while the sum is 34.

The square root of 36642661 is about 6053.3181809649. The cubic root of 36642661 is about 332.1459808261.

The spelling of 36642661 in words is "thirty-six million, six hundred forty-two thousand, six hundred sixty-one".