66874019215740 has 192 divisors, whose sum is σ = 216293709542400. Its totient is φ = 15257671004160.

The previous prime is 66874019215727. The next prime is 66874019215763. The reversal of 66874019215740 is 4751291047866.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 347151489 + ... + 347344071.

It is an arithmetic number, because the mean of its divisors is an integer number (1126529737200).

Almost surely, 2^{66874019215740} is an apocalyptic number.

66874019215740 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 66874019215740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108146854771200).

66874019215740 is an abundant number, since it is smaller than the sum of its proper divisors (149419690326660).

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

66874019215740 is a wasteful number, since it uses less digits than its factorization.

66874019215740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223572 (or 223570 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 66874019215740 in words is "sixty-six trillion, eight hundred seventy-four billion, nineteen million, two hundred fifteen thousand, seven hundred forty".