6467252621 has 2 divisors, whose sum is σ = 6467252622. Its totient is φ = 6467252620.

The previous prime is 6467252497. The next prime is 6467252639. The reversal of 6467252621 is 1262527646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5623350121 + 843902500 = 74989^2 + 29050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6467252621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6467252021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233626310 + 3233626311.

It is an arithmetic number, because the mean of its divisors is an integer number (3233626311).

Almost surely, 2^6467252621 is an apocalyptic number.

It is an amenable number.

6467252621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6467252621 is an equidigital number, since it uses as much as digits as its factorization.

6467252621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The square root of 6467252621 is about 80419.2304178547. The cubic root of 6467252621 is about 1863.1161988918.

The spelling of 6467252621 in words is "six billion, four hundred sixty-seven million, two hundred fifty-two thousand, six hundred twenty-one".