66298761 has 6 divisors (see below), whose sum is σ = 95764890. Its totient is φ = 44199168.

The previous prime is 66298753. The next prime is 66298769. The reversal of 66298761 is 16789266.

It is an interprime number because it is at equal distance from previous prime (66298753) and next prime (66298769).

It can be written as a sum of positive squares in only one way, i.e., 58430736 + 7868025 = 7644^2 + 2805^2 .

It is not a de Polignac number, because 66298761 - 2³ = 66298753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66298769) 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, 3683256 + ... + 3683273.

It is an arithmetic number, because the mean of its divisors is an integer number (15960815).

Almost surely, 2^66298761 is an apocalyptic number.

It is an amenable number.

66298761 is a deficient number, since it is larger than the sum of its proper divisors (29466129).

66298761 is a wasteful number, since it uses less digits than its factorization.

66298761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366535 (or 7366532 counting only the distinct ones).

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

The square root of 66298761 is about 8142.4051115134. The cubic root of 66298761 is about 404.7328645329.

The spelling of 66298761 in words is "sixty-six million, two hundred ninety-eight thousand, seven hundred sixty-one".