66735087856 has 20 divisors (see below), whose sum is σ = 131490747000. Its totient is φ = 32801991872.

The previous prime is 66735087823. The next prime is 66735087877. The reversal of 66735087856 is 65878053766.

It is a super-2 number, since 2×66735087856² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66735087794 and 66735087803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35346031 + ... + 35347918.

It is an arithmetic number, because the mean of its divisors is an integer number (6574537350).

Almost surely, 2^66735087856 is an apocalyptic number.

It is an amenable number.

66735087856 is a deficient number, since it is larger than the sum of its proper divisors (64755659144).

66735087856 is a wasteful number, since it uses less digits than its factorization.

66735087856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70694016 (or 70694010 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 66735087856 in words is "sixty-six billion, seven hundred thirty-five million, eighty-seven thousand, eight hundred fifty-six".