721674474376507 has 2 divisors, whose sum is σ = 721674474376508. Its totient is φ = 721674474376506.

The previous prime is 721674474376439. The next prime is 721674474376547. The reversal of 721674474376507 is 705673474476127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721674474376507 - 2¹¹ = 721674474374459 is a prime.

It is not a weakly prime, because it can be changed into another prime (721674474376547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360837237188253 + 360837237188254.

It is an arithmetic number, because the mean of its divisors is an integer number (360837237188254).

Almost surely, 2^{721674474376507} is an apocalyptic number.

721674474376507 is a deficient number, since it is larger than the sum of its proper divisors (1).

721674474376507 is an equidigital number, since it uses as much as digits as its factorization.

721674474376507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161699840, while the sum is 70.

The spelling of 721674474376507 in words is "seven hundred twenty-one trillion, six hundred seventy-four billion, four hundred seventy-four million, three hundred seventy-six thousand, five hundred seven".