660147659490 has 128 divisors (see below), whose sum is σ = 1785669525504. Its totient is φ = 154740672000.

The previous prime is 660147659477. The next prime is 660147659557. The reversal of 660147659490 is 94956741066.

It is a self number, because there is not a number n which added to its sum of digits gives 660147659490.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12177345 + ... + 12231435.

It is an arithmetic number, because the mean of its divisors is an integer number (13950543168).

Almost surely, 2^660147659490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660147659490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892834762752).

660147659490 is an abundant number, since it is smaller than the sum of its proper divisors (1125521866014).

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

660147659490 is a wasteful number, since it uses less digits than its factorization.

660147659490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55336.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 660147659490 in words is "six hundred sixty billion, one hundred forty-seven million, six hundred fifty-nine thousand, four hundred ninety".