996699521451 has 8 divisors (see below), whose sum is σ = 1329066956944. Its totient is φ = 664399216800.

The previous prime is 996699521413. The next prime is 996699521483. The reversal of 996699521451 is 154125996699.

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

It is not a de Polignac number, because 996699521451 - 2¹⁵ = 996699488683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996699521351) 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, 16748056 + ... + 16807461.

It is an arithmetic number, because the mean of its divisors is an integer number (166133369618).

Almost surely, 2^996699521451 is an apocalyptic number.

996699521451 is a deficient number, since it is larger than the sum of its proper divisors (332367435493).

996699521451 is a wasteful number, since it uses less digits than its factorization.

996699521451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33565421.

The product of its digits is 47239200, while the sum is 66.

The spelling of 996699521451 in words is "nine hundred ninety-six billion, six hundred ninety-nine million, five hundred twenty-one thousand, four hundred fifty-one".