66116650 has 12 divisors (see below), whose sum is σ = 122977062. Its totient is φ = 26446640.

The previous prime is 66116647. The next prime is 66116653. The reversal of 66116650 is 5661166.

It is an interprime number because it is at equal distance from previous prime (66116647) and next prime (66116653).

It can be written as a sum of positive squares in 3 ways, for example, as 63154809 + 2961841 = 7947^2 + 1721^2 .

It is a super-2 number, since 2×66116650² = 8742822814445000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66116653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661117 + ... + 661216.

Almost surely, 2^66116650 is an apocalyptic number.

66116650 is a deficient number, since it is larger than the sum of its proper divisors (56860412).

66116650 is a wasteful number, since it uses less digits than its factorization.

66116650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322345 (or 1322340 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 66116650 is about 8131.2145464254. The cubic root of 66116650 is about 404.3619481194.

It can be divided in two parts, 66116 and 650, that added together give a palindrome (66766).

The spelling of 66116650 in words is "sixty-six million, one hundred sixteen thousand, six hundred fifty".