66176065 has 8 divisors (see below), whose sum is σ = 80909928. Its totient is φ = 51941760.

The previous prime is 66176063. The next prime is 66176081. The reversal of 66176065 is 56067166.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17901361 + 48274704 = 4231^2 + 6948^2 .

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

It is not a de Polignac number, because 66176065 - 2¹ = 66176063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66176063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124596 + ... + 125125.

It is an arithmetic number, because the mean of its divisors is an integer number (10113741).

Almost surely, 2^66176065 is an apocalyptic number.

It is an amenable number.

66176065 is a deficient number, since it is larger than the sum of its proper divisors (14733863).

66176065 is a wasteful number, since it uses less digits than its factorization.

66176065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249779.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 66176065 is about 8134.8672392363. The cubic root of 66176065 is about 404.4830369933.

It can be divided in two parts, 661760 and 65, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 66176065 in words is "sixty-six million, one hundred seventy-six thousand, sixty-five".