667704101 has 2 divisors, whose sum is σ = 667704102. Its totient is φ = 667704100.

The previous prime is 667704097. The next prime is 667704127. The reversal of 667704101 is 101407766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558187876 + 109516225 = 23626^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 667704101 - 2² = 667704097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_34665530 and since 667704101 and 34665530 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667704601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333852050 + 333852051.

It is an arithmetic number, because the mean of its divisors is an integer number (333852051).

Almost surely, 2^667704101 is an apocalyptic number.

It is an amenable number.

667704101 is a deficient number, since it is larger than the sum of its proper divisors (1).

667704101 is an equidigital number, since it uses as much as digits as its factorization.

667704101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 667704101 is about 25839.9709945658. The cubic root of 667704101 is about 874.0333710707.

The spelling of 667704101 in words is "six hundred sixty-seven million, seven hundred four thousand, one hundred one".