66337998 has 16 divisors (see below), whose sum is σ = 134545536. Its totient is φ = 21801080.

The previous prime is 66337981. The next prime is 66338021. The reversal of 66337998 is 89973366.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66337998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77436 + ... + 78287.

It is an arithmetic number, because the mean of its divisors is an integer number (8409096).

Almost surely, 2^66337998 is an apocalyptic number.

66337998 is an abundant number, since it is smaller than the sum of its proper divisors (68207538).

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

66337998 is a wasteful number, since it uses less digits than its factorization.

66337998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155799.

The product of its digits is 1469664, while the sum is 51.

The square root of 66337998 is about 8144.8141783591. The cubic root of 66337998 is about 404.8126919253.

The spelling of 66337998 in words is "sixty-six million, three hundred thirty-seven thousand, nine hundred ninety-eight".