1066505686 has 8 divisors (see below), whose sum is σ = 1642995360. Its totient is φ = 518840568.

The previous prime is 1066505683. The next prime is 1066505689. The reversal of 1066505686 is 6865056601.

It is an interprime number because it is at equal distance from previous prime (1066505683) and next prime (1066505689).

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

It is a super-2 number, since 2×1066505686² = 2274868756540661192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066505683) 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, 7206046 + ... + 7206193.

It is an arithmetic number, because the mean of its divisors is an integer number (205374420).

Almost surely, 2^1066505686 is an apocalyptic number.

1066505686 is a deficient number, since it is larger than the sum of its proper divisors (576489674).

1066505686 is a wasteful number, since it uses less digits than its factorization.

1066505686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14412278.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 1066505686 is about 32657.3986410430. The cubic root of 1066505686 is about 1021.6945068540.

The spelling of 1066505686 in words is "one billion, sixty-six million, five hundred five thousand, six hundred eighty-six".