66011560461 has 48 divisors (see below), whose sum is σ = 119077171200. Its totient is φ = 34234256160.

The previous prime is 66011560453. The next prime is 66011560513. The reversal of 66011560461 is 16406511066.

It is a happy number.

66011560461 is a `hidden beast` number, since 6 + 601 + 1 + 5 + 6 + 0 + 46 + 1 = 666.

It is not a de Polignac number, because 66011560461 - 2³ = 66011560453 is a prime.

It is a super-3 number, since 3×66011560461³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011560441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 335596 + ... + 494618.

It is an arithmetic number, because the mean of its divisors is an integer number (2480774400).

Almost surely, 2^66011560461 is an apocalyptic number.

It is an amenable number.

66011560461 is a deficient number, since it is larger than the sum of its proper divisors (53065610739).

66011560461 is a wasteful number, since it uses less digits than its factorization.

66011560461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159646 (or 159643 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 66011560461 in words is "sixty-six billion, eleven million, five hundred sixty thousand, four hundred sixty-one".