53666516441 has 4 divisors (see below), whose sum is σ = 53690191632. Its totient is φ = 53642841252.

The previous prime is 53666516411. The next prime is 53666516509. The reversal of 53666516441 is 14461566635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53666516441 - 2²⁶ = 53599407577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53666516401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11834195 + ... + 11838728.

It is an arithmetic number, because the mean of its divisors is an integer number (13422547908).

Almost surely, 2^53666516441 is an apocalyptic number.

It is an amenable number.

53666516441 is a deficient number, since it is larger than the sum of its proper divisors (23675191).

53666516441 is a wasteful number, since it uses less digits than its factorization.

53666516441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23675190.

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

The spelling of 53666516441 in words is "fifty-three billion, six hundred sixty-six million, five hundred sixteen thousand, four hundred forty-one".