66910527486 has 72 divisors (see below), whose sum is σ = 159414228792. Its totient is φ = 20267781600.

The previous prime is 66910527407. The next prime is 66910527529. The reversal of 66910527486 is 68472501966.

66910527486 is a `hidden beast` number, since 6 + 69 + 10 + 527 + 48 + 6 = 666.

It is a super-2 number, since 2×66910527486² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7546696 + ... + 7555556.

It is an arithmetic number, because the mean of its divisors is an integer number (2214086511).

Almost surely, 2^66910527486 is an apocalyptic number.

66910527486 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 66910527486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79707114396).

66910527486 is an abundant number, since it is smaller than the sum of its proper divisors (92503701306).

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

66910527486 is a wasteful number, since it uses less digits than its factorization.

66910527486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12358 (or 12344 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 66910527486 in words is "sixty-six billion, nine hundred ten million, five hundred twenty-seven thousand, four hundred eighty-six".