6666540224736 has 384 divisors, whose sum is σ = 21477017963520. Its totient is φ = 1768383332352.

The previous prime is 6666540224689. The next prime is 6666540224777. The reversal of 6666540224736 is 6374220456666.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

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, 146311270 + ... + 146356826.

It is an arithmetic number, because the mean of its divisors is an integer number (55929734280).

Almost surely, 2^{6666540224736} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666540224736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10738508981760).

6666540224736 is an abundant number, since it is smaller than the sum of its proper divisors (14810477738784).

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

6666540224736 is a wasteful number, since it uses less digits than its factorization.

6666540224736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45826 (or 45818 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 57.

The spelling of 6666540224736 in words is "six trillion, six hundred sixty-six billion, five hundred forty million, two hundred twenty-four thousand, seven hundred thirty-six".