66051656655 has 32 divisors (see below), whose sum is σ = 106652617920. Its totient is φ = 34904432640.

The previous prime is 66051656653. The next prime is 66051656663. The reversal of 66051656655 is 55665615066.

It is not a de Polignac number, because 66051656655 - 2¹ = 66051656653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66051656598 and 66051656607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051656651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8825515 + ... + 8832995.

It is an arithmetic number, because the mean of its divisors is an integer number (3332894310).

Almost surely, 2^66051656655 is an apocalyptic number.

66051656655 is a deficient number, since it is larger than the sum of its proper divisors (40600961265).

66051656655 is a wasteful number, since it uses less digits than its factorization.

66051656655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12811.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 66051656655 in words is "sixty-six billion, fifty-one million, six hundred fifty-six thousand, six hundred fifty-five".