1066166515 has 4 divisors (see below), whose sum is σ = 1279399824. Its totient is φ = 852933208.

The previous prime is 1066166503. The next prime is 1066166567. The reversal of 1066166515 is 5156616601.

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 1066166515 - 2⁵ = 1066166483 is a prime.

It is a super-2 number, since 2×1066166515² = 2273422075414490450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106616647 + ... + 106616656.

It is an arithmetic number, because the mean of its divisors is an integer number (319849956).

Almost surely, 2^1066166515 is an apocalyptic number.

1066166515 is a deficient number, since it is larger than the sum of its proper divisors (213233309).

1066166515 is an equidigital number, since it uses as much as digits as its factorization.

1066166515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213233308.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1066166515 is about 32652.2053619660. The cubic root of 1066166515 is about 1021.5861886665.

The spelling of 1066166515 in words is "one billion, sixty-six million, one hundred sixty-six thousand, five hundred fifteen".