99668078 has 4 divisors (see below), whose sum is σ = 149502120. Its totient is φ = 49834038.

The previous prime is 99668077. The next prime is 99668081. The reversal of 99668078 is 87086699.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99668071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24917018 + ... + 24917021.

It is an arithmetic number, because the mean of its divisors is an integer number (37375530).

Almost surely, 2^99668078 is an apocalyptic number.

99668078 is a deficient number, since it is larger than the sum of its proper divisors (49834042).

99668078 is a wasteful number, since it uses less digits than its factorization.

99668078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49834041.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 99668078 is about 9983.3901055704. The cubic root of 99668078 is about 463.6447656348.

The spelling of 99668078 in words is "ninety-nine million, six hundred sixty-eight thousand, seventy-eight".