66761298 has 12 divisors (see below), whose sum is σ = 144649518. Its totient is φ = 22253760.

The previous prime is 66761297. The next prime is 66761309. The reversal of 66761298 is 89216766.

It can be written as a sum of positive squares in only one way, i.e., 54420129 + 12341169 = 7377^2 + 3513^2 .

It is not an unprimeable number, because it can be changed into a prime (66761293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1854463 + ... + 1854498.

Almost surely, 2^66761298 is an apocalyptic number.

66761298 is an abundant number, since it is smaller than the sum of its proper divisors (77888220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66761298 is a wasteful number, since it uses less digits than its factorization.

66761298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708969 (or 3708966 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 66761298 is about 8170.7587163005. The cubic root of 66761298 is about 405.6718979601.

The spelling of 66761298 in words is "sixty-six million, seven hundred sixty-one thousand, two hundred ninety-eight".