66495605 has 16 divisors (see below), whose sum is σ = 87398784. Its totient is φ = 48166080.

The previous prime is 66495601. The next prime is 66495631. The reversal of 66495605 is 50659466.

It is not a de Polignac number, because 66495605 - 2² = 66495601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66495601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12167 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (5462424).

Almost surely, 2^66495605 is an apocalyptic number.

It is an amenable number.

66495605 is a deficient number, since it is larger than the sum of its proper divisors (20903179).

66495605 is a wasteful number, since it uses less digits than its factorization.

66495605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4876.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 66495605 is about 8154.4837359578. The cubic root of 66495605 is about 405.1330254479.

It can be divided in two parts, 664 and 95605, that added together give a palindrome (96269).

The spelling of 66495605 in words is "sixty-six million, four hundred ninety-five thousand, six hundred five".