66510701 has 2 divisors, whose sum is σ = 66510702. Its totient is φ = 66510700.

The previous prime is 66510677. The next prime is 66510713. The reversal of 66510701 is 10701566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59274601 + 7236100 = 7699^2 + 2690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66510701 is a prime.

It is a super-2 number, since 2×66510701² = 8847346695022802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66510751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33255350 + 33255351.

It is an arithmetic number, because the mean of its divisors is an integer number (33255351).

Almost surely, 2^66510701 is an apocalyptic number.

It is an amenable number.

66510701 is a deficient number, since it is larger than the sum of its proper divisors (1).

66510701 is an equidigital number, since it uses as much as digits as its factorization.

66510701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 66510701 is about 8155.4093091641. The cubic root of 66510701 is about 405.1636812354.

The spelling of 66510701 in words is "sixty-six million, five hundred ten thousand, seven hundred one".