660662019360 has 384 divisors, whose sum is σ = 2692515893760. Its totient is φ = 148158885888.

The previous prime is 660662019343. The next prime is 660662019379. The reversal of 660662019360 is 63910266066.

660662019360 is a `hidden beast` number, since 6 + 6 + 0 + 6 + 620 + 19 + 3 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1396614 + ... + 1808826.

It is an arithmetic number, because the mean of its divisors is an integer number (7011760140).

Almost surely, 2^660662019360 is an apocalyptic number.

660662019360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660662019360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346257946880).

660662019360 is an abundant number, since it is smaller than the sum of its proper divisors (2031853874400).

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

660662019360 is a wasteful number, since it uses less digits than its factorization.

660662019360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412297 (or 412283 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 660662019360 in words is "six hundred sixty billion, six hundred sixty-two million, nineteen thousand, three hundred sixty".