66565262061 has 12 divisors (see below), whose sum is σ = 96214502592. Its totient is φ = 44346989256.

The previous prime is 66565262041. The next prime is 66565262147. The reversal of 66565262061 is 16026256566.

It is a happy number.

66565262061 is a `hidden beast` number, since 6 + 6 + 565 + 2 + 6 + 20 + 61 = 666.

It is not a de Polignac number, because 66565262061 - 2⁷ = 66565261933 is a prime.

It is a super-2 number, since 2×66565262061² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66565261998 and 66565262016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66565262041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2473551 + ... + 2500316.

It is an arithmetic number, because the mean of its divisors is an integer number (8017875216).

Almost surely, 2^66565262061 is an apocalyptic number.

It is an amenable number.

66565262061 is a deficient number, since it is larger than the sum of its proper divisors (29649240531).

66565262061 is a wasteful number, since it uses less digits than its factorization.

66565262061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975360 (or 4975357 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 66565262061 in words is "sixty-six billion, five hundred sixty-five million, two hundred sixty-two thousand, sixty-one".