65166055549 has 24 divisors (see below), whose sum is σ = 81030656448. Its totient is φ = 52124909760.

The previous prime is 65166055547. The next prime is 65166055583. The reversal of 65166055549 is 94555066156.

It is not a de Polignac number, because 65166055549 - 2¹ = 65166055547 is a prime.

It is a super-2 number, since 2×65166055549² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65166055496 and 65166055505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65166055547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 658947 + ... + 751360.

It is an arithmetic number, because the mean of its divisors is an integer number (3376277352).

Almost surely, 2^65166055549 is an apocalyptic number.

It is an amenable number.

65166055549 is a deficient number, since it is larger than the sum of its proper divisors (15864600899).

65166055549 is a wasteful number, since it uses less digits than its factorization.

65166055549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410385 (or 1410378 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 65166055549 in words is "sixty-five billion, one hundred sixty-six million, fifty-five thousand, five hundred forty-nine".