66998657265 has 8 divisors (see below), whose sum is σ = 107197851648. Its totient is φ = 35732617200.

The previous prime is 66998657213. The next prime is 66998657291. The reversal of 66998657265 is 56275689966.

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

It is not a de Polignac number, because 66998657265 - 2¹³ = 66998649073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66998657265.

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, 2233288561 + ... + 2233288590.

It is an arithmetic number, because the mean of its divisors is an integer number (13399731456).

Almost surely, 2^66998657265 is an apocalyptic number.

It is an amenable number.

66998657265 is a deficient number, since it is larger than the sum of its proper divisors (40199194383).

66998657265 is a wasteful number, since it uses less digits than its factorization.

66998657265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466577159.

The product of its digits is 293932800, while the sum is 69.

The spelling of 66998657265 in words is "sixty-six billion, nine hundred ninety-eight million, six hundred fifty-seven thousand, two hundred sixty-five".