66460465 has 4 divisors (see below), whose sum is σ = 79752564. Its totient is φ = 53168368.

The previous prime is 66460451. The next prime is 66460469. The reversal of 66460465 is 56406466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56406466 = 2 ⋅28203233.

It can be written as a sum of positive squares in 2 ways, for example, as 30735936 + 35724529 = 5544^2 + 5977^2 .

It is a cyclic number.

It is not a de Polignac number, because 66460465 - 2⁷ = 66460337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66460469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6646042 + ... + 6646051.

It is an arithmetic number, because the mean of its divisors is an integer number (19938141).

Almost surely, 2^66460465 is an apocalyptic number.

It is an amenable number.

66460465 is a deficient number, since it is larger than the sum of its proper divisors (13292099).

66460465 is a wasteful number, since it uses less digits than its factorization.

66460465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13292098.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 66460465 is about 8152.3288083835. The cubic root of 66460465 is about 405.0616478834.

The spelling of 66460465 in words is "sixty-six million, four hundred sixty thousand, four hundred sixty-five".