663967771459 has 4 divisors (see below), whose sum is σ = 664069473160. Its totient is φ = 663866069760.

The previous prime is 663967771451. The next prime is 663967771483. The reversal of 663967771459 is 954177769366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954177769366 = 2 ⋅477088884683.

It is a cyclic number.

It is not a de Polignac number, because 663967771459 - 2³ = 663967771451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663967771451) 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, 50841057 + ... + 50854114.

It is an arithmetic number, because the mean of its divisors is an integer number (166017368290).

Almost surely, 2^663967771459 is an apocalyptic number.

663967771459 is a deficient number, since it is larger than the sum of its proper divisors (101701701).

663967771459 is a wasteful number, since it uses less digits than its factorization.

663967771459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101701700.

The product of its digits is 360067680, while the sum is 70.

The spelling of 663967771459 in words is "six hundred sixty-three billion, nine hundred sixty-seven million, seven hundred seventy-one thousand, four hundred fifty-nine".