66738265 has 16 divisors (see below), whose sum is σ = 87837696. Its totient is φ = 48275200.

The previous prime is 66738253. The next prime is 66738293. The reversal of 66738265 is 56283766.

It is not a de Polignac number, because 66738265 - 2⁵ = 66738233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7329 + ... + 13681.

It is an arithmetic number, because the mean of its divisors is an integer number (5489856).

Almost surely, 2^66738265 is an apocalyptic number.

It is an amenable number.

66738265 is a deficient number, since it is larger than the sum of its proper divisors (21099431).

66738265 is a wasteful number, since it uses less digits than its factorization.

66738265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560.

The product of its digits is 362880, while the sum is 43.

The square root of 66738265 is about 8169.3491172798. The cubic root of 66738265 is about 405.6252396123.

The spelling of 66738265 in words is "sixty-six million, seven hundred thirty-eight thousand, two hundred sixty-five".