7221457667 has 2 divisors, whose sum is σ = 7221457668. Its totient is φ = 7221457666.

The previous prime is 7221457613. The next prime is 7221457741. The reversal of 7221457667 is 7667541227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7221457667 - 2⁶ = 7221457603 is a prime.

It is not a weakly prime, because it can be changed into another prime (7221457267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610728833 + 3610728834.

It is an arithmetic number, because the mean of its divisors is an integer number (3610728834).

Almost surely, 2^7221457667 is an apocalyptic number.

7221457667 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221457667 is an equidigital number, since it uses as much as digits as its factorization.

7221457667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 47.

The square root of 7221457667 is about 84979.1601923672. The cubic root of 7221457667 is about 1932.8951213483.

The spelling of 7221457667 in words is "seven billion, two hundred twenty-one million, four hundred fifty-seven thousand, six hundred sixty-seven".