66520298 has 8 divisors (see below), whose sum is σ = 107455908. Its totient is φ = 30701664.

The previous prime is 66520283. The next prime is 66520313. The reversal of 66520298 is 89202566.

It is an interprime number because it is at equal distance from previous prime (66520283) and next prime (66520313).

It can be written as a sum of positive squares in 2 ways, for example, as 66373609 + 146689 = 8147^2 + 383^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279211 + ... + 1279262.

Almost surely, 2^66520298 is an apocalyptic number.

66520298 is a deficient number, since it is larger than the sum of its proper divisors (40935610).

66520298 is a wasteful number, since it uses less digits than its factorization.

66520298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558488.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 66520298 is about 8155.9976704263. The cubic root of 66520298 is about 405.1831676678.

Adding to 66520298 its sum of digits (38), we get a square (66520336 = 8156²).

The spelling of 66520298 in words is "sixty-six million, five hundred twenty thousand, two hundred ninety-eight".