166514665 has 8 divisors (see below), whose sum is σ = 206708040. Its totient is φ = 128618112.

The previous prime is 166514627. The next prime is 166514729. The reversal of 166514665 is 566415661.

It can be written as a sum of positive squares in 4 ways, for example, as 48944016 + 117570649 = 6996^2 + 10843^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 166514665 - 2¹⁷ = 166383593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574044 + ... + 574333.

It is an arithmetic number, because the mean of its divisors is an integer number (25838505).

Almost surely, 2^166514665 is an apocalyptic number.

It is an amenable number.

166514665 is a deficient number, since it is larger than the sum of its proper divisors (40193375).

166514665 is a wasteful number, since it uses less digits than its factorization.

166514665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148411.

The product of its digits is 129600, while the sum is 40.

The square root of 166514665 is about 12904.0561452591. The cubic root of 166514665 is about 550.1538577820.

It can be divided in two parts, 16651 and 4665, that added together give a square (21316 = 146²).

The spelling of 166514665 in words is "one hundred sixty-six million, five hundred fourteen thousand, six hundred sixty-five".