66155082740 has 48 divisors (see below), whose sum is σ = 147113366400. Its totient is φ = 24919155072.

The previous prime is 66155082731. The next prime is 66155082761. The reversal of 66155082740 is 4728055166.

It is a junction number, because it is equal to n+sod(n) for n = 66155082691 and 66155082700.

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, 457775 + ... + 584694.

It is an arithmetic number, because the mean of its divisors is an integer number (3064861800).

Almost surely, 2^66155082740 is an apocalyptic number.

It is an amenable number.

66155082740 is an abundant number, since it is smaller than the sum of its proper divisors (80958283660).

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

66155082740 is a wasteful number, since it uses less digits than its factorization.

66155082740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042664 (or 1042662 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 66155082740 in words is "sixty-six billion, one hundred fifty-five million, eighty-two thousand, seven hundred forty".