663780087366 has 24 divisors (see below), whose sum is σ = 1459219036632. Its totient is φ = 201145480800.

The previous prime is 663780087343. The next prime is 663780087367.

663780087366 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×663780087366² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663780087367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 457148095 + ... + 457149546.

It is an arithmetic number, because the mean of its divisors is an integer number (60800793193).

Almost surely, 2^663780087366 is an apocalyptic number.

663780087366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

663780087366 is an abundant number, since it is smaller than the sum of its proper divisors (795438949266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663780087366 is a wasteful number, since it uses less digits than its factorization.

663780087366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914297668 (or 914297657 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 60.

The spelling of 663780087366 in words is "six hundred sixty-three billion, seven hundred eighty million, eighty-seven thousand, three hundred sixty-six".