89660406697 has 4 divisors (see below), whose sum is σ = 89661532500. Its totient is φ = 89659280896.

The previous prime is 89660406653. The next prime is 89660406757. The reversal of 89660406697 is 79660406698.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47499587136 + 42160819561 = 217944^2 + 205331^2 .

It is a cyclic number.

It is not a de Polignac number, because 89660406697 - 2⁷ = 89660406569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89660406637) 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, 433528 + ... + 606025.

It is an arithmetic number, because the mean of its divisors is an integer number (22415383125).

Almost surely, 2^89660406697 is an apocalyptic number.

It is an amenable number.

89660406697 is a deficient number, since it is larger than the sum of its proper divisors (1125803).

89660406697 is a wasteful number, since it uses less digits than its factorization.

89660406697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125802.

The product of its (nonzero) digits is 23514624, while the sum is 61.

Subtracting from 89660406697 its reverse (79660406698), we obtain a palindrome (9999999999).

The spelling of 89660406697 in words is "eighty-nine billion, six hundred sixty million, four hundred six thousand, six hundred ninety-seven".