66615542110 has 16 divisors (see below), whose sum is σ = 129131666496. Its totient is φ = 24596507808.

The previous prime is 66615542033. The next prime is 66615542153. The reversal of 66615542110 is 1124551666.

It is a self number, because there is not a number n which added to its sum of digits gives 66615542110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256213494 + ... + 256213753.

It is an arithmetic number, because the mean of its divisors is an integer number (8070729156).

Almost surely, 2^66615542110 is an apocalyptic number.

66615542110 is a deficient number, since it is larger than the sum of its proper divisors (62516124386).

66615542110 is a wasteful number, since it uses less digits than its factorization.

66615542110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512427267.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 66615542110 in words is "sixty-six billion, six hundred fifteen million, five hundred forty-two thousand, one hundred ten".