66654042441 has 16 divisors (see below), whose sum is σ = 101599334400. Its totient is φ = 38076298128.

The previous prime is 66654042439. The next prime is 66654042449. The reversal of 66654042441 is 14424045666.

It is not a de Polignac number, because 66654042441 - 2¹ = 66654042439 is a prime.

It is a super-2 number, since 2×66654042441² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66654042393 and 66654042402.

It is not an unprimeable number, because it can be changed into a prime (66654042449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418521 + ... + 555398.

It is an arithmetic number, because the mean of its divisors is an integer number (6349958400).

Almost surely, 2^66654042441 is an apocalyptic number.

It is an amenable number.

66654042441 is a deficient number, since it is larger than the sum of its proper divisors (34945291959).

66654042441 is a wasteful number, since it uses less digits than its factorization.

66654042441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977188.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 66654042441 in words is "sixty-six billion, six hundred fifty-four million, forty-two thousand, four hundred forty-one".