1066625531 has 4 divisors (see below), whose sum is σ = 1080127200. Its totient is φ = 1053123864.

The previous prime is 1066625519. The next prime is 1066625533. The reversal of 1066625531 is 1355266601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1066625531 - 2²⁶ = 999516667 is a prime.

It is a super-2 number, since 2×1066625531² = 2275380046762063922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1066625491 and 1066625500.

It is not an unprimeable number, because it can be changed into a prime (1066625533) 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, 6750716 + ... + 6750873.

It is an arithmetic number, because the mean of its divisors is an integer number (270031800).

Almost surely, 2^1066625531 is an apocalyptic number.

1066625531 is a deficient number, since it is larger than the sum of its proper divisors (13501669).

1066625531 is an equidigital number, since it uses as much as digits as its factorization.

1066625531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13501668.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1066625531 is about 32659.2334723275. The cubic root of 1066625531 is about 1021.7327752520.

The spelling of 1066625531 in words is "one billion, sixty-six million, six hundred twenty-five thousand, five hundred thirty-one".