66074702499 has 120 divisors (see below), whose sum is σ = 110823236160. Its totient is φ = 37823692608.

The previous prime is 66074702497. The next prime is 66074702501. The reversal of 66074702499 is 99420747066.

It is a happy number.

66074702499 is a `hidden beast` number, since 6 + 60 + 7 + 470 + 24 + 99 = 666.

It is a Cunningham number, because it is equal to 257050²-1.

It is an interprime number because it is at equal distance from previous prime (66074702497) and next prime (66074702501).

It is not a de Polignac number, because 66074702499 - 2¹ = 66074702497 is a prime.

It is a super-3 number, since 3×66074702499³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66074702497) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 405366192 + ... + 405366354.

It is an arithmetic number, because the mean of its divisors is an integer number (923526968).

Almost surely, 2^66074702499 is an apocalyptic number.

66074702499 is a deficient number, since it is larger than the sum of its proper divisors (44748533661).

66074702499 is a wasteful number, since it uses less digits than its factorization.

With its successor (66074702500) it forms an eRAP, since the sums of their prime factors are consecutive (323 and 324).

66074702499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 66074702499 in words is "sixty-six billion, seventy-four million, seven hundred two thousand, four hundred ninety-nine".