66835102656 has 112 divisors (see below), whose sum is σ = 202170832640. Its totient is φ = 19088732160.

The previous prime is 66835102597. The next prime is 66835102721. The reversal of 66835102656 is 65620153866.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 4469400 + ... + 4484328.

It is an arithmetic number, because the mean of its divisors is an integer number (1805096720).

Almost surely, 2^66835102656 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 66835102656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101085416320).

66835102656 is an abundant number, since it is smaller than the sum of its proper divisors (135335729984).

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

66835102656 is a wasteful number, since it uses less digits than its factorization.

66835102656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18282 (or 18272 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 66835102656 in words is "sixty-six billion, eight hundred thirty-five million, one hundred two thousand, six hundred fifty-six".