816882666550 has 12 divisors (see below), whose sum is σ = 1519401759876. Its totient is φ = 326753066600.

The previous prime is 816882666547. The next prime is 816882666569. The reversal of 816882666550 is 55666288618.

It is a happy number.

It is a super-3 number, since 3×816882666550³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8168826616 + ... + 8168826715.

It is an arithmetic number, because the mean of its divisors is an integer number (126616813323).

Almost surely, 2^816882666550 is an apocalyptic number.

816882666550 is a deficient number, since it is larger than the sum of its proper divisors (702519093326).

816882666550 is a wasteful number, since it uses less digits than its factorization.

816882666550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16337653343 (or 16337653338 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 61.

The spelling of 816882666550 in words is "eight hundred sixteen billion, eight hundred eighty-two million, six hundred sixty-six thousand, five hundred fifty".