66867401 has 2 divisors, whose sum is σ = 66867402. Its totient is φ = 66867400.

The previous prime is 66867389. The next prime is 66867413. The reversal of 66867401 is 10476866.

It is a balanced prime because it is at equal distance from previous prime (66867389) and next prime (66867413).

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 11215801 = 7460^2 + 3349^2 .

It is a cyclic number.

It is not a de Polignac number, because 66867401 - 2²² = 62673097 is a prime.

It is not a weakly prime, because it can be changed into another prime (66267401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33433700 + 33433701.

It is an arithmetic number, because the mean of its divisors is an integer number (33433701).

Almost surely, 2^66867401 is an apocalyptic number.

It is an amenable number.

66867401 is a deficient number, since it is larger than the sum of its proper divisors (1).

66867401 is an equidigital number, since it uses as much as digits as its factorization.

66867401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 66867401 is about 8177.2489872817. The cubic root of 66867401 is about 405.8866941779.

The spelling of 66867401 in words is "sixty-six million, eight hundred sixty-seven thousand, four hundred one".