3966373857 has 4 divisors (see below), whose sum is σ = 5288498480. Its totient is φ = 2644249236.

The previous prime is 3966373849. The next prime is 3966373883. The reversal of 3966373857 is 7583736693.

It is a happy number.

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 3966373857 - 2³ = 3966373849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3966373797 and 3966373806.

It is not an unprimeable number, because it can be changed into a prime (3966373837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661062307 + ... + 661062312.

It is an arithmetic number, because the mean of its divisors is an integer number (1322124620).

Almost surely, 2^3966373857 is an apocalyptic number.

It is an amenable number.

3966373857 is a deficient number, since it is larger than the sum of its proper divisors (1322124623).

3966373857 is a wasteful number, since it uses less digits than its factorization.

3966373857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322124622.

The product of its digits is 17146080, while the sum is 57.

The square root of 3966373857 is about 62979.1541464317. The cubic root of 3966373857 is about 1582.9403475974.

The spelling of 3966373857 in words is "three billion, nine hundred sixty-six million, three hundred seventy-three thousand, eight hundred fifty-seven".