3978075737663 has 8 divisors (see below), whose sum is σ = 4193829735648. Its totient is φ = 3765887921664.

The previous prime is 3978075737627. The next prime is 3978075737681. The reversal of 3978075737663 is 3667375708793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3978075737663 - 2⁸ = 3978075737407 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 (3978075037663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891543206 + ... + 891547667.

It is an arithmetic number, because the mean of its divisors is an integer number (524228716956).

Almost surely, 2^{3978075737663} is an apocalyptic number.

3978075737663 is a deficient number, since it is larger than the sum of its proper divisors (215753997985).

3978075737663 is a wasteful number, since it uses less digits than its factorization.

3978075737663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783090993.

The product of its (nonzero) digits is 840157920, while the sum is 71.

The spelling of 3978075737663 in words is "three trillion, nine hundred seventy-eight billion, seventy-five million, seven hundred thirty-seven thousand, six hundred sixty-three".