720619667 has 2 divisors, whose sum is σ = 720619668. Its totient is φ = 720619666.

The previous prime is 720619661. The next prime is 720619699. The reversal of 720619667 is 766916027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720619667 - 2¹⁴ = 720603283 is a prime.

It is not a weakly prime, because it can be changed into another prime (720619661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360309833 + 360309834.

It is an arithmetic number, because the mean of its divisors is an integer number (360309834).

Almost surely, 2^720619667 is an apocalyptic number.

720619667 is a deficient number, since it is larger than the sum of its proper divisors (1).

720619667 is an equidigital number, since it uses as much as digits as its factorization.

720619667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 720619667 is about 26844.3600594240. The cubic root of 720619667 is about 896.5380032326.

The spelling of 720619667 in words is "seven hundred twenty million, six hundred nineteen thousand, six hundred sixty-seven".