6667622501 has 2 divisors, whose sum is σ = 6667622502. Its totient is φ = 6667622500.

The previous prime is 6667622471. The next prime is 6667622573. The reversal of 6667622501 is 1052267666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6650565601 + 17056900 = 81551^2 + 4130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6667622501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6667625501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333811250 + 3333811251.

It is an arithmetic number, because the mean of its divisors is an integer number (3333811251).

Almost surely, 2^6667622501 is an apocalyptic number.

It is an amenable number.

6667622501 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667622501 is an equidigital number, since it uses as much as digits as its factorization.

6667622501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 6667622501 is about 81655.5111489727. The cubic root of 6667622501 is about 1882.1620009182.

The spelling of 6667622501 in words is "six billion, six hundred sixty-seven million, six hundred twenty-two thousand, five hundred one".