3966852571601 has 4 divisors (see below), whose sum is σ = 4011423948900. Its totient is φ = 3922281194304.

The previous prime is 3966852571579. The next prime is 3966852571603. The reversal of 3966852571601 is 1061752586693.

It is a happy number.

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 866805688576 + 3100046883025 = 931024^2 + 1760695^2 .

It is a cyclic number.

It is not a de Polignac number, because 3966852571601 - 2⁶ = 3966852571537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3966852571603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22285688516 + ... + 22285688693.

It is an arithmetic number, because the mean of its divisors is an integer number (1002855987225).

Almost surely, 2^{3966852571601} is an apocalyptic number.

It is an amenable number.

3966852571601 is a deficient number, since it is larger than the sum of its proper divisors (44571377299).

3966852571601 is an equidigital number, since it uses as much as digits as its factorization.

3966852571601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44571377298.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 3966852571601 in words is "three trillion, nine hundred sixty-six billion, eight hundred fifty-two million, five hundred seventy-one thousand, six hundred one".