57666027561261 has 16 divisors (see below), whose sum is σ = 90902112412800. Its totient is φ = 31815739343808.

The previous prime is 57666027561251. The next prime is 57666027561341. The reversal of 57666027561261 is 16216572066675.

It is a happy number.

It is not a de Polignac number, because 57666027561261 - 2³⁸ = 57391149654317 is a prime.

It is a super-2 number, since 2×57666027561261² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57666027561195 and 57666027561204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57666027561251) 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, 47344849606 + ... + 47344850823.

It is an arithmetic number, because the mean of its divisors is an integer number (5681382025800).

Almost surely, 2^{57666027561261} is an apocalyptic number.

It is an amenable number.

57666027561261 is a deficient number, since it is larger than the sum of its proper divisors (33236084851539).

57666027561261 is a wasteful number, since it uses less digits than its factorization.

57666027561261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94689700468.

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 57666027561261 in words is "fifty-seven trillion, six hundred sixty-six billion, twenty-seven million, five hundred sixty-one thousand, two hundred sixty-one".