56666501106066 has 12 divisors (see below), whose sum is σ = 122777419063182. Its totient is φ = 18888833702016.

The previous prime is 56666501105999. The next prime is 56666501106107. The reversal of 56666501106066 is 66060110566665.

It can be written as a sum of positive squares in only one way, i.e., 44699640836841 + 11966860269225 = 6685779^2 + 3459315^2 .

It is a super-2 number, since 2×56666501106066² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1574069475151 + ... + 1574069475186.

Almost surely, 2^{56666501106066} is an apocalyptic number.

56666501106066 is an abundant number, since it is smaller than the sum of its proper divisors (66110917957116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56666501106066 is a wasteful number, since it uses less digits than its factorization.

56666501106066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148138950345 (or 3148138950342 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 56666501106066 in words is "fifty-six trillion, six hundred sixty-six billion, five hundred one million, one hundred six thousand, sixty-six".