66077736420848 has 80 divisors (see below), whose sum is σ = 134200613277696. Its totient is φ = 31458430080000.

The previous prime is 66077736420823. The next prime is 66077736420911. The reversal of 66077736420848 is 84802463777066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1957783973 + ... + 1957817723.

Almost surely, 2^{66077736420848} 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 66077736420848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67100306638848).

66077736420848 is an abundant number, since it is smaller than the sum of its proper divisors (68122876856848).

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

66077736420848 is a wasteful number, since it uses less digits than its factorization.

66077736420848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57862 (or 57856 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 68.

The spelling of 66077736420848 in words is "sixty-six trillion, seventy-seven billion, seven hundred thirty-six million, four hundred twenty thousand, eight hundred forty-eight".