66501606212054 has 32 divisors (see below), whose sum is σ = 107673528130560. Its totient is φ = 30622239771552.

The previous prime is 66501606212047. The next prime is 66501606212081. The reversal of 66501606212054 is 45021260610566.

It is a junction number, because it is equal to n+sod(n) for n = 66501606211996 and 66501606212014.

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, 250118717 + ... + 250384455.

It is an arithmetic number, because the mean of its divisors is an integer number (3364797754080).

Almost surely, 2^{66501606212054} is an apocalyptic number.

66501606212054 is a deficient number, since it is larger than the sum of its proper divisors (41171921918506).

66501606212054 is a wasteful number, since it uses less digits than its factorization.

66501606212054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287924.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 66501606212054 in words is "sixty-six trillion, five hundred one billion, six hundred six million, two hundred twelve thousand, fifty-four".