66055520516630 has 16 divisors (see below), whose sum is σ = 118967996455920. Its totient is φ = 26407083867552.

The previous prime is 66055520516617. The next prime is 66055520516641. The reversal of 66055520516630 is 3661502555066.

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, 1890524045 + ... + 1890558984.

It is an arithmetic number, because the mean of its divisors is an integer number (7435499778495).

Almost surely, 2^{66055520516630} is an apocalyptic number.

66055520516630 is a deficient number, since it is larger than the sum of its proper divisors (52912475939290).

66055520516630 is a wasteful number, since it uses less digits than its factorization.

66055520516630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781084783.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 66055520516630 in words is "sixty-six trillion, fifty-five billion, five hundred twenty million, five hundred sixteen thousand, six hundred thirty".