1066372181 has 8 divisors (see below), whose sum is σ = 1218924864. Its totient is φ = 913872960.

The previous prime is 1066372147. The next prime is 1066372183. The reversal of 1066372181 is 1812736601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1066372181 is a prime.

It is a super-2 number, since 2×1066372181² = 2274299256821393522, 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 (1066372183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48461 + ... + 66941.

It is an arithmetic number, because the mean of its divisors is an integer number (152365608).

Almost surely, 2^1066372181 is an apocalyptic number.

It is an amenable number.

1066372181 is a deficient number, since it is larger than the sum of its proper divisors (152552683).

1066372181 is an equidigital number, since it uses as much as digits as its factorization.

1066372181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26731.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1066372181 is about 32655.3545532735. The cubic root of 1066372181 is about 1021.6518732270.

The spelling of 1066372181 in words is "one billion, sixty-six million, three hundred seventy-two thousand, one hundred eighty-one".