196661697 has 16 divisors (see below), whose sum is σ = 271703040. Its totient is φ = 126427392.

The previous prime is 196661687. The next prime is 196661713. The reversal of 196661697 is 796166691.

196661697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 196661697 - 2⁴ = 196661681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196661657) 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, 4704 + ... + 20382.

It is an arithmetic number, because the mean of its divisors is an integer number (16981440).

Almost surely, 2^196661697 is an apocalyptic number.

It is an amenable number.

196661697 is a deficient number, since it is larger than the sum of its proper divisors (75041343).

196661697 is a wasteful number, since it uses less digits than its factorization.

196661697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15832.

The product of its digits is 734832, while the sum is 51.

The square root of 196661697 is about 14023.6121238431. The cubic root of 196661697 is about 581.5315221297.

The spelling of 196661697 in words is "one hundred ninety-six million, six hundred sixty-one thousand, six hundred ninety-seven".