66541463651 has 8 divisors (see below), whose sum is σ = 71664942384. Its totient is φ = 61418685600.

The previous prime is 66541463647. The next prime is 66541463693. The reversal of 66541463651 is 15636414566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66541463651 - 2² = 66541463647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66541463596 and 66541463605.

It is not an unprimeable number, because it can be changed into a prime (66541463251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31076 + ... + 366126.

It is an arithmetic number, because the mean of its divisors is an integer number (8958117798).

Almost surely, 2^66541463651 is an apocalyptic number.

66541463651 is a deficient number, since it is larger than the sum of its proper divisors (5123478733).

66541463651 is a wasteful number, since it uses less digits than its factorization.

66541463651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350341.

The product of its digits is 1555200, while the sum is 47.

The spelling of 66541463651 in words is "sixty-six billion, five hundred forty-one million, four hundred sixty-three thousand, six hundred fifty-one".