66120050 has 24 divisors (see below), whose sum is σ = 124260276. Its totient is φ = 26173440.

The previous prime is 66120017. The next prime is 66120059. The reversal of 66120050 is 5002166.

It can be written as a sum of positive squares in 6 ways, for example, as 29019769 + 37100281 = 5387^2 + 6091^2 .

It is a super-2 number, since 2×66120050² = 8743722024005000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66120059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1967 + ... + 11666.

Almost surely, 2^66120050 is an apocalyptic number.

66120050 is a deficient number, since it is larger than the sum of its proper divisors (58140226).

66120050 is a wasteful number, since it uses less digits than its factorization.

66120050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13742 (or 13737 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 66120050 is about 8131.4236145954. The cubic root of 66120050 is about 404.3688793390.

The spelling of 66120050 in words is "sixty-six million, one hundred twenty thousand, fifty".