66746472 has 128 divisors (see below), whose sum is σ = 190095360. Its totient is φ = 19388160.

The previous prime is 66746447. The next prime is 66746473. The reversal of 66746472 is 27464766.

It is not an unprimeable number, because it can be changed into a prime (66746473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 647973 + ... + 648075.

It is an arithmetic number, because the mean of its divisors is an integer number (1485120).

Almost surely, 2^66746472 is an apocalyptic number.

66746472 is a gapful number since it is divisible by the number (62) 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 66746472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95047680).

66746472 is an abundant number, since it is smaller than the sum of its proper divisors (123348888).

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

66746472 is a wasteful number, since it uses less digits than its factorization.

66746472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 219 counting only the distinct ones).

The product of its digits is 338688, while the sum is 42.

The square root of 66746472 is about 8169.8514062374. The cubic root of 66746472 is about 405.6418659055.

The spelling of 66746472 in words is "sixty-six million, seven hundred forty-six thousand, four hundred seventy-two".