660287782066 has 32 divisors (see below), whose sum is σ = 1091924222400. Its totient is φ = 296957119680.

The previous prime is 660287782019. The next prime is 660287782079.

660287782066 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×660287782066² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660287782066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1506001 + ... + 1894363.

It is an arithmetic number, because the mean of its divisors is an integer number (34122631950).

Almost surely, 2^660287782066 is an apocalyptic number.

660287782066 is a deficient number, since it is larger than the sum of its proper divisors (431636440334).

660287782066 is a wasteful number, since it uses less digits than its factorization.

660287782066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389194.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 660287782066 in words is "six hundred sixty billion, two hundred eighty-seven million, seven hundred eighty-two thousand, sixty-six".