66557098 has 8 divisors (see below), whose sum is σ = 100191780. Its totient is φ = 33159840.

The previous prime is 66557087. The next prime is 66557107. The reversal of 66557098 is 89075566.

It can be written as a sum of positive squares in 2 ways, for example, as 66536649 + 20449 = 8157^2 + 143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58653 + ... + 59776.

Almost surely, 2^66557098 is an apocalyptic number.

66557098 is a deficient number, since it is larger than the sum of its proper divisors (33634682).

66557098 is a wasteful number, since it uses less digits than its factorization.

66557098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118712.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 66557098 is about 8158.2533669898. The cubic root of 66557098 is about 405.2578716416.

The spelling of 66557098 in words is "sixty-six million, five hundred fifty-seven thousand, ninety-eight".