3651656366 has 4 divisors (see below), whose sum is σ = 5477484552. Its totient is φ = 1825828182.

The previous prime is 3651656347. The next prime is 3651656369. The reversal of 3651656366 is 6636561563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6636561563 = 43 ⋅154338641.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3651656366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651656369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912914090 + ... + 912914093.

It is an arithmetic number, because the mean of its divisors is an integer number (1369371138).

Almost surely, 2^3651656366 is an apocalyptic number.

3651656366 is a deficient number, since it is larger than the sum of its proper divisors (1825828186).

3651656366 is a wasteful number, since it uses less digits than its factorization.

3651656366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825828185.

The product of its digits is 1749600, while the sum is 47.

The square root of 3651656366 is about 60428.9364956889. The cubic root of 3651656366 is about 1539.9145910355.

The spelling of 3651656366 in words is "three billion, six hundred fifty-one million, six hundred fifty-six thousand, three hundred sixty-six".