66198924 has 96 divisors (see below), whose sum is σ = 189396480. Its totient is φ = 19828800.

The previous prime is 66198917. The next prime is 66198931. The reversal of 66198924 is 42989166.

It is a happy number.

66198924 is a `hidden beast` number, since 6 + 619 + 8 + 9 + 24 = 666.

It is an interprime number because it is at equal distance from previous prime (66198917) and next prime (66198931).

It is a self number, because there is not a number n which added to its sum of digits gives 66198924.

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, 122094 + ... + 122634.

It is an arithmetic number, because the mean of its divisors is an integer number (1972880).

Almost surely, 2^66198924 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 66198924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94698240).

66198924 is an abundant number, since it is smaller than the sum of its proper divisors (123197556).

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

66198924 is a wasteful number, since it uses less digits than its factorization.

66198924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 660 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 66198924 is about 8136.2721193431. The cubic root of 66198924 is about 404.5296047533.

The spelling of 66198924 in words is "sixty-six million, one hundred ninety-eight thousand, nine hundred twenty-four".