866446233403653 has 48 divisors (see below), whose sum is σ = 1434141368524800. Its totient is φ = 493790795356320.

The previous prime is 866446233403651. The next prime is 866446233403693. The reversal of 866446233403653 is 356304332644668.

866446233403653 is a `hidden beast` number, since 8 + 6 + 64 + 462 + 3 + 34 + 0 + 36 + 53 = 666.

It is not a de Polignac number, because 866446233403653 - 2¹ = 866446233403651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866446233403651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 812025028 + ... + 813091346.

It is an arithmetic number, because the mean of its divisors is an integer number (29877945177600).

Almost surely, 2^{866446233403653} is an apocalyptic number.

It is an amenable number.

866446233403653 is a deficient number, since it is larger than the sum of its proper divisors (567695135121147).

866446233403653 is a wasteful number, since it uses less digits than its factorization.

866446233403653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100742 (or 1100739 counting only the distinct ones).

The product of its (nonzero) digits is 537477120, while the sum is 63.

The spelling of 866446233403653 in words is "eight hundred sixty-six trillion, four hundred forty-six billion, two hundred thirty-three million, four hundred three thousand, six hundred fifty-three".