66616488 has 48 divisors (see below), whose sum is σ = 182126880. Its totient is φ = 21995424.

The previous prime is 66616477. The next prime is 66616493. The reversal of 66616488 is 88461666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3381 + ... + 12027.

It is an arithmetic number, because the mean of its divisors is an integer number (3794310).

Almost surely, 2^66616488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66616488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91063440).

66616488 is an abundant number, since it is smaller than the sum of its proper divisors (115510392).

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

66616488 is a wasteful number, since it uses less digits than its factorization.

66616488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766 (or 8759 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 66616488 is about 8161.8924276175. The cubic root of 66616488 is about 405.3783752414.

The spelling of 66616488 in words is "sixty-six million, six hundred sixteen thousand, four hundred eighty-eight".