1066645515 has 32 divisors (see below), whose sum is σ = 1845619776. Its totient is φ = 522915840.

The previous prime is 1066645507. The next prime is 1066645519. The reversal of 1066645515 is 5155466601.

It is not a de Polignac number, because 1066645515 - 2³ = 1066645507 is a prime.

It is a super-2 number, since 2×1066645515² = 2275465309339230450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1066645519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35647 + ... + 58343.

It is an arithmetic number, because the mean of its divisors is an integer number (57675618).

Almost surely, 2^1066645515 is an apocalyptic number.

1066645515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1066645515 is a deficient number, since it is larger than the sum of its proper divisors (778974261).

1066645515 is a wasteful number, since it uses less digits than its factorization.

1066645515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22959.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 1066645515 is about 32659.5394180628. The cubic root of 1066645515 is about 1021.7391561794.

The spelling of 1066645515 in words is "one billion, sixty-six million, six hundred forty-five thousand, five hundred fifteen".