196664709 has 4 divisors (see below), whose sum is σ = 262219616. Its totient is φ = 131109804.

The previous prime is 196664693. The next prime is 196664719. The reversal of 196664709 is 907466691.

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.

It is not a de Polignac number, because 196664709 - 2⁴ = 196664693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196664719) 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, 32777449 + ... + 32777454.

It is an arithmetic number, because the mean of its divisors is an integer number (65554904).

Almost surely, 2^196664709 is an apocalyptic number.

It is an amenable number.

196664709 is a deficient number, since it is larger than the sum of its proper divisors (65554907).

196664709 is an equidigital number, since it uses as much as digits as its factorization.

196664709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65554906.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 196664709 is about 14023.7195137381. The cubic root of 196664709 is about 581.5344909572.

The spelling of 196664709 in words is "one hundred ninety-six million, six hundred sixty-four thousand, seven hundred nine".