67620406376401 has 2 divisors, whose sum is σ = 67620406376402. Its totient is φ = 67620406376400.

The previous prime is 67620406376377. The next prime is 67620406376539. The reversal of 67620406376401 is 10467360402676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35753523330625 + 31866883045776 = 5979425^2 + 5645076^2 .

It is a cyclic number.

It is not a de Polignac number, because 67620406376401 - 2⁹ = 67620406375889 is a prime.

It is a super-2 number, since 2×67620406376401² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67620406316401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33810203188200 + 33810203188201.

It is an arithmetic number, because the mean of its divisors is an integer number (33810203188201).

Almost surely, 2^{67620406376401} is an apocalyptic number.

It is an amenable number.

67620406376401 is a deficient number, since it is larger than the sum of its proper divisors (1).

67620406376401 is an equidigital number, since it uses as much as digits as its factorization.

67620406376401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 52.

The spelling of 67620406376401 in words is "sixty-seven trillion, six hundred twenty billion, four hundred six million, three hundred seventy-six thousand, four hundred one".