420066637 has 2 divisors, whose sum is σ = 420066638. Its totient is φ = 420066636.

The previous prime is 420066599. The next prime is 420066671. The reversal of 420066637 is 736660024.

It is an a-pointer prime, because the next prime (420066671) can be obtained adding 420066637 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330839721 + 89226916 = 18189^2 + 9446^2 .

It is a cyclic number.

It is not a de Polignac number, because 420066637 - 2⁷ = 420066509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420066697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210033318 + 210033319.

It is an arithmetic number, because the mean of its divisors is an integer number (210033319).

Almost surely, 2^420066637 is an apocalyptic number.

It is an amenable number.

420066637 is a deficient number, since it is larger than the sum of its proper divisors (1).

420066637 is an equidigital number, since it uses as much as digits as its factorization.

420066637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 420066637 is about 20495.5272437671. The cubic root of 420066637 is about 748.9268426583.

The spelling of 420066637 in words is "four hundred twenty million, sixty-six thousand, six hundred thirty-seven".