660894498066 has 32 divisors (see below), whose sum is σ = 1445716574208. Its totient is φ = 199748151440.

The previous prime is 660894498037. The next prime is 660894498071.

660894498066 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 660894497988 and 660894498006.

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, 13047246 + ... + 13097801.

It is an arithmetic number, because the mean of its divisors is an integer number (45178642944).

Almost surely, 2^660894498066 is an apocalyptic number.

660894498066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

660894498066 is an abundant number, since it is smaller than the sum of its proper divisors (784822076142).

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

660894498066 is a wasteful number, since it uses less digits than its factorization.

660894498066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26145446.

The product of its (nonzero) digits is 107495424, while the sum is 66.

The spelling of 660894498066 in words is "six hundred sixty billion, eight hundred ninety-four million, four hundred ninety-eight thousand, sixty-six".