66715655110 has 48 divisors (see below), whose sum is σ = 131029390800. Its totient is φ = 24445349760.

The previous prime is 66715655087. The next prime is 66715655131. The reversal of 66715655110 is 1155651766.

It is a super-2 number, since 2×66715655110² (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 23 ways as a sum of consecutive naturals, for example, 70716 + ... + 372064.

It is an arithmetic number, because the mean of its divisors is an integer number (2729778975).

Almost surely, 2^66715655110 is an apocalyptic number.

66715655110 is a deficient number, since it is larger than the sum of its proper divisors (64313735690).

66715655110 is a wasteful number, since it uses less digits than its factorization.

66715655110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301513 (or 301500 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 66715655110 in words is "sixty-six billion, seven hundred fifteen million, six hundred fifty-five thousand, one hundred ten".