1066636946445 has 32 divisors (see below), whose sum is σ = 2053075630080. Its totient is φ = 461942015040.

The previous prime is 1066636946429. The next prime is 1066636946449. The reversal of 1066636946445 is 5446496366601.

It is not a de Polignac number, because 1066636946445 - 2⁴ = 1066636946429 is a prime.

It is a super-2 number, since 2×1066636946445² (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 (1066636946449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267325561 + ... + 267329550.

It is an arithmetic number, because the mean of its divisors is an integer number (64158613440).

Almost surely, 2^{1066636946445} is an apocalyptic number.

1066636946445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066636946445 is a deficient number, since it is larger than the sum of its proper divisors (986438683635).

1066636946445 is a wasteful number, since it uses less digits than its factorization.

1066636946445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534655145.

The product of its (nonzero) digits is 67184640, while the sum is 60.

The spelling of 1066636946445 in words is "one trillion, sixty-six billion, six hundred thirty-six million, nine hundred forty-six thousand, four hundred forty-five".