66712488 has 64 divisors (see below), whose sum is σ = 178277760. Its totient is φ = 20729856.

The previous prime is 66712423. The next prime is 66712493. The reversal of 66712488 is 88421766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45381 + ... + 46827.

It is an arithmetic number, because the mean of its divisors is an integer number (2785590).

Almost surely, 2^66712488 is an apocalyptic number.

66712488 is a gapful number since it is divisible by the number (68) 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 66712488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89138880).

66712488 is an abundant number, since it is smaller than the sum of its proper divisors (111565272).

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

66712488 is a wasteful number, since it uses less digits than its factorization.

66712488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1582 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 66712488 is about 8167.7712994427. The cubic root of 66712488 is about 405.5730099644.

The spelling of 66712488 in words is "sixty-six million, seven hundred twelve thousand, four hundred eighty-eight".