66281024 has 14 divisors (see below), whose sum is σ = 131526534. Its totient is φ = 33140480.

The previous prime is 66281021. The next prime is 66281027. The reversal of 66281024 is 42018266.

It is an interprime number because it is at equal distance from previous prime (66281021) and next prime (66281027).

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 25321024 = 6400^2 + 5032^2 .

It is not an unprimeable number, because it can be changed into a prime (66281021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 517757 + ... + 517884.

Almost surely, 2^66281024 is an apocalyptic number.

66281024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66281024 is a deficient number, since it is larger than the sum of its proper divisors (65245510).

66281024 is a wasteful number, since it uses less digits than its factorization.

66281024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035653 (or 1035643 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 66281024 is about 8141.3158641586. The cubic root of 66281024 is about 404.6967683978.

The spelling of 66281024 in words is "sixty-six million, two hundred eighty-one thousand, twenty-four".