420666767 has 2 divisors, whose sum is σ = 420666768. Its totient is φ = 420666766.

The previous prime is 420666739. The next prime is 420666769. The reversal of 420666767 is 767666024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420666767 - 2⁶ = 420666703 is a prime.

Together with 420666769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420666769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210333383 + 210333384.

It is an arithmetic number, because the mean of its divisors is an integer number (210333384).

Almost surely, 2^420666767 is an apocalyptic number.

420666767 is a deficient number, since it is larger than the sum of its proper divisors (1).

420666767 is an equidigital number, since it uses as much as digits as its factorization.

420666767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 420666767 is about 20510.1625298290. The cubic root of 420666767 is about 749.2833254624.

The spelling of 420666767 in words is "four hundred twenty million, six hundred sixty-six thousand, seven hundred sixty-seven".