1066712057565 has 64 divisors (see below), whose sum is σ = 2132622950400. Its totient is φ = 442321367040.

The previous prime is 1066712057561. The next prime is 1066712057633. The reversal of 1066712057565 is 5657502176601.

It is not a de Polignac number, because 1066712057565 - 2² = 1066712057561 is a prime.

It is a super-2 number, since 2×1066712057565² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066712057561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 509869 + ... + 1547058.

It is an arithmetic number, because the mean of its divisors is an integer number (33322233600).

Almost surely, 2^{1066712057565} is an apocalyptic number.

1066712057565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066712057565 is a deficient number, since it is larger than the sum of its proper divisors (1065910892835).

1066712057565 is a wasteful number, since it uses less digits than its factorization.

1066712057565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057402.

The product of its (nonzero) digits is 2646000, while the sum is 51.

The spelling of 1066712057565 in words is "one trillion, sixty-six billion, seven hundred twelve million, fifty-seven thousand, five hundred sixty-five".