66024720 has 200 divisors, whose sum is σ = 239823936. Its totient is φ = 16803072.

The previous prime is 66024713. The next prime is 66024727. The reversal of 66024720 is 2742066.

It is an interprime number because it is at equal distance from previous prime (66024713) and next prime (66024727).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (66024727) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 148819 + ... + 149261.

Almost surely, 2^66024720 is an apocalyptic number.

66024720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66024720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119911968).

66024720 is an abundant number, since it is smaller than the sum of its proper divisors (173799216).

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

66024720 is a wasteful number, since it uses less digits than its factorization.

66024720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 66024720 is about 8125.5596730318. The cubic root of 66024720 is about 404.1744500337.

Adding to 66024720 its reverse (2742066), we get a palindrome (68766786).

The spelling of 66024720 in words is "sixty-six million, twenty-four thousand, seven hundred twenty".