99670756897 has 4 divisors (see below), whose sum is σ = 101988681520. Its totient is φ = 97352832276.

The previous prime is 99670756891. The next prime is 99670756921. The reversal of 99670756897 is 79865707699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79865707699 = 239 ⋅334166141.

It is a cyclic number.

It is not a de Polignac number, because 99670756897 - 2¹⁵ = 99670724129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99670756891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158962247 + ... + 1158962332.

It is an arithmetic number, because the mean of its divisors is an integer number (25497170380).

Almost surely, 2^99670756897 is an apocalyptic number.

It is an amenable number.

99670756897 is a deficient number, since it is larger than the sum of its proper divisors (2317924623).

99670756897 is a wasteful number, since it uses less digits than its factorization.

99670756897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317924622.

The product of its (nonzero) digits is 360067680, while the sum is 73.

The spelling of 99670756897 in words is "ninety-nine billion, six hundred seventy million, seven hundred fifty-six thousand, eight hundred ninety-seven".