60665557 has 2 divisors, whose sum is σ = 60665558. Its totient is φ = 60665556.

The previous prime is 60665551. The next prime is 60665567. The reversal of 60665557 is 75556606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43970161 + 16695396 = 6631^2 + 4086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60665557 is a prime.

It is a super-2 number, since 2×60665557² = 7360619612240498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60665551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30332778 + 30332779.

It is an arithmetic number, because the mean of its divisors is an integer number (30332779).

Almost surely, 2^60665557 is an apocalyptic number.

It is an amenable number.

60665557 is a deficient number, since it is larger than the sum of its proper divisors (1).

60665557 is an equidigital number, since it uses as much as digits as its factorization.

60665557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 60665557 is about 7788.8097293489. The cubic root of 60665557 is about 392.9289820675.

The spelling of 60665557 in words is "sixty million, six hundred sixty-five thousand, five hundred fifty-seven".