866825320566448 has 80 divisors (see below), whose sum is σ = 1708791858892800. Its totient is φ = 425854144627200.

The previous prime is 866825320566437. The next prime is 866825320566473. The reversal of 866825320566448 is 844665023528668.

It is a super-2 number, since 2×866825320566448² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38682005868 + ... + 38682028276.

It is an arithmetic number, because the mean of its divisors is an integer number (21359898236160).

Almost surely, 2^{866825320566448} is an apocalyptic number.

It is an amenable number.

866825320566448 is a deficient number, since it is larger than the sum of its proper divisors (841966538326352).

866825320566448 is a wasteful number, since it uses less digits than its factorization.

866825320566448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41090 (or 41084 counting only the distinct ones).

The product of its (nonzero) digits is 3185049600, while the sum is 73.

The spelling of 866825320566448 in words is "eight hundred sixty-six trillion, eight hundred twenty-five billion, three hundred twenty million, five hundred sixty-six thousand, four hundred forty-eight".