1066116541 has 4 divisors (see below), whose sum is σ = 1218418912. Its totient is φ = 913814172.

The previous prime is 1066116521. The next prime is 1066116547. The reversal of 1066116541 is 1456116601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1456116601 = 139 ⋅10475659.

It is a cyclic number.

It is not a de Polignac number, because 1066116541 - 2¹⁷ = 1065985469 is a prime.

It is a super-2 number, since 2×1066116541² = 2273208957987609362, which 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 (1066116547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76151175 + ... + 76151188.

It is an arithmetic number, because the mean of its divisors is an integer number (304604728).

Almost surely, 2^1066116541 is an apocalyptic number.

It is an amenable number.

1066116541 is a deficient number, since it is larger than the sum of its proper divisors (152302371).

1066116541 is an equidigital number, since it uses as much as digits as its factorization.

1066116541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152302370.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1066116541 is about 32651.4401060658. The cubic root of 1066116541 is about 1021.5702269491.

The spelling of 1066116541 in words is "one billion, sixty-six million, one hundred sixteen thousand, five hundred forty-one".