1066640015 has 16 divisors (see below), whose sum is σ = 1467450432. Its totient is φ = 729095424.

The previous prime is 1066640009. The next prime is 1066640017. The reversal of 1066640015 is 5100466601.

It is a cyclic number.

It is not a de Polignac number, because 1066640015 - 2⁸ = 1066639759 is a prime.

It is a super-2 number, since 2×1066640015² = 2275441843198400450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066640015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066640017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36974 + ... + 59163.

It is an arithmetic number, because the mean of its divisors is an integer number (91715652).

Almost surely, 2^1066640015 is an apocalyptic number.

1066640015 is a deficient number, since it is larger than the sum of its proper divisors (400810417).

1066640015 is an equidigital number, since it uses as much as digits as its factorization.

1066640015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96466.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1066640015 is about 32659.4552159095. The cubic root of 1066640015 is about 1021.7374000274.

The spelling of 1066640015 in words is "one billion, sixty-six million, six hundred forty thousand, fifteen".