3920666578043 has 4 divisors (see below), whose sum is σ = 3924396994488. Its totient is φ = 3916936161600.

The previous prime is 3920666578027. The next prime is 3920666578061. The reversal of 3920666578043 is 3408756660293.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3920666578043 - 2⁴ = 3920666578027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3920666571043) 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, 1865206646 + ... + 1865208747.

It is an arithmetic number, because the mean of its divisors is an integer number (981099248622).

Almost surely, 2^{3920666578043} is an apocalyptic number.

3920666578043 is a deficient number, since it is larger than the sum of its proper divisors (3730416445).

3920666578043 is a wasteful number, since it uses less digits than its factorization.

3920666578043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730416444.

The product of its (nonzero) digits is 39191040, while the sum is 59.

The spelling of 3920666578043 in words is "three trillion, nine hundred twenty billion, six hundred sixty-six million, five hundred seventy-eight thousand, forty-three".