99996778 has 32 divisors (see below), whose sum is σ = 181186560. Its totient is φ = 40463280.

The previous prime is 99996769. The next prime is 99996779. The reversal of 99996778 is 87769999.

It is a super-2 number, since 2×99996778² = 19998711220762568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99996779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23473 + ... + 27403.

It is an arithmetic number, because the mean of its divisors is an integer number (5662080).

Almost surely, 2^99996778 is an apocalyptic number.

99996778 is a deficient number, since it is larger than the sum of its proper divisors (81189782).

99996778 is a wasteful number, since it uses less digits than its factorization.

99996778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042.

The product of its digits is 15431472, while the sum is 64.

The square root of 99996778 is about 9999.8388987023. The cubic root of 99996778 is about 464.1538982413.

The spelling of 99996778 in words is "ninety-nine million, nine hundred ninety-six thousand, seven hundred seventy-eight".