660266984388 has 24 divisors (see below), whose sum is σ = 1680679596960. Its totient is φ = 200080904320.

The previous prime is 660266984387. The next prime is 660266984449. The reversal of 660266984388 is 883489662066.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (660266984387) 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, 2501011173 + ... + 2501011436.

It is an arithmetic number, because the mean of its divisors is an integer number (70028316540).

Almost surely, 2^660266984388 is an apocalyptic number.

It is an amenable number.

660266984388 is an abundant number, since it is smaller than the sum of its proper divisors (1020412612572).

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

660266984388 is a wasteful number, since it uses less digits than its factorization.

660266984388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002022627 (or 5002022625 counting only the distinct ones).

The product of its (nonzero) digits is 143327232, while the sum is 66.

The spelling of 660266984388 in words is "six hundred sixty billion, two hundred sixty-six million, nine hundred eighty-four thousand, three hundred eighty-eight".