66116465 has 8 divisors (see below), whose sum is σ = 80427048. Its totient is φ = 52168320.

The previous prime is 66116429. The next prime is 66116483. The reversal of 66116465 is 56461166.

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 65869456 = 497^2 + 8116^2 .

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

It is not a de Polignac number, because 66116465 - 2²⁰ = 65067889 is a prime.

It is a Duffinian number.

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, 90206 + ... + 90935.

It is an arithmetic number, because the mean of its divisors is an integer number (10053381).

Almost surely, 2^66116465 is an apocalyptic number.

It is an amenable number.

66116465 is a deficient number, since it is larger than the sum of its proper divisors (14310583).

66116465 is a wasteful number, since it uses less digits than its factorization.

66116465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181219.

The product of its digits is 25920, while the sum is 35.

The square root of 66116465 is about 8131.2031705031. The cubic root of 66116465 is about 404.3615709727.

The spelling of 66116465 in words is "sixty-six million, one hundred sixteen thousand, four hundred sixty-five".