1056665217007 has 16 divisors (see below), whose sum is σ = 1132388685792. Its totient is φ = 982451000320.

The previous prime is 1056665216989. The next prime is 1056665217053. The reversal of 1056665217007 is 7007125666501.

It is a happy number.

It is not a de Polignac number, because 1056665217007 - 2¹¹ = 1056665214959 is a prime.

It is a super-2 number, since 2×1056665217007² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056665247007) 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, 28146213 + ... + 28183729.

It is an arithmetic number, because the mean of its divisors is an integer number (70774292862).

Almost surely, 2^{1056665217007} is an apocalyptic number.

1056665217007 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1056665217007 is a deficient number, since it is larger than the sum of its proper divisors (75723468785).

1056665217007 is a wasteful number, since it uses less digits than its factorization.

1056665217007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57578.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 1056665217007 in words is "one trillion, fifty-six billion, six hundred sixty-five million, two hundred seventeen thousand, seven".