816663744741 has 8 divisors (see below), whose sum is σ = 1172645377120. Its totient is φ = 502562304432.

The previous prime is 816663744629. The next prime is 816663744791. The reversal of 816663744741 is 147447366618.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816663744741 - 2¹⁰ = 816663743717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816663744791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10470047971 + ... + 10470048048.

It is an arithmetic number, because the mean of its divisors is an integer number (146580672140).

Almost surely, 2^816663744741 is an apocalyptic number.

It is an amenable number.

816663744741 is a deficient number, since it is larger than the sum of its proper divisors (355981632379).

816663744741 is a wasteful number, since it uses less digits than its factorization.

816663744741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20940096035.

The product of its digits is 16257024, while the sum is 57.

It can be divided in two parts, 8166637 and 44741, that added together give a triangular number (8211378 = T₄₀₅₂).

The spelling of 816663744741 in words is "eight hundred sixteen billion, six hundred sixty-three million, seven hundred forty-four thousand, seven hundred forty-one".