66759498 has 64 divisors (see below), whose sum is σ = 162489600. Its totient is φ = 20191680.

The previous prime is 66759481. The next prime is 66759529. The reversal of 66759498 is 89495766.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42043 + ... + 43601.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^66759498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66759498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81244800).

66759498 is an abundant number, since it is smaller than the sum of its proper divisors (95730102).

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

66759498 is a wasteful number, since it uses less digits than its factorization.

66759498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1638 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 66759498 is about 8170.6485666684. The cubic root of 66759498 is about 405.6682520555.

The spelling of 66759498 in words is "sixty-six million, seven hundred fifty-nine thousand, four hundred ninety-eight".