196665407 has 4 divisors (see below), whose sum is σ = 196818336. Its totient is φ = 196512480.

The previous prime is 196665383. The next prime is 196665439. The reversal of 196665407 is 704566691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704566691 = 37 ⋅19042343.

It is a cyclic number.

It is not a de Polignac number, because 196665407 - 2¹⁴ = 196649023 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 (196665487) 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, 74519 + ... + 77112.

It is an arithmetic number, because the mean of its divisors is an integer number (49204584).

Almost surely, 2^196665407 is an apocalyptic number.

196665407 is a deficient number, since it is larger than the sum of its proper divisors (152929).

196665407 is a wasteful number, since it uses less digits than its factorization.

196665407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152928.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 196665407 is about 14023.7444001237. The cubic root of 196665407 is about 581.5351789481.

The spelling of 196665407 in words is "one hundred ninety-six million, six hundred sixty-five thousand, four hundred seven".