620664763 has 2 divisors, whose sum is σ = 620664764. Its totient is φ = 620664762.

The previous prime is 620664749. The next prime is 620664767. The reversal of 620664763 is 367466026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620664763 - 2⁵ = 620664731 is a prime.

It is not a weakly prime, because it can be changed into another prime (620664767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310332381 + 310332382.

It is an arithmetic number, because the mean of its divisors is an integer number (310332382).

Almost surely, 2^620664763 is an apocalyptic number.

620664763 is a deficient number, since it is larger than the sum of its proper divisors (1).

620664763 is an equidigital number, since it uses as much as digits as its factorization.

620664763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 620664763 is about 24913.1443820325. The cubic root of 620664763 is about 853.0065446737.

The spelling of 620664763 in words is "six hundred twenty million, six hundred sixty-four thousand, seven hundred sixty-three".