67777001 has 2 divisors, whose sum is σ = 67777002. Its totient is φ = 67777000.

The previous prime is 67776997. The next prime is 67777019. The reversal of 67777001 is 10077776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64818601 + 2958400 = 8051^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 67777001 - 2² = 67776997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67777091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33888500 + 33888501.

It is an arithmetic number, because the mean of its divisors is an integer number (33888501).

Almost surely, 2^67777001 is an apocalyptic number.

It is an amenable number.

67777001 is a deficient number, since it is larger than the sum of its proper divisors (1).

67777001 is an equidigital number, since it uses as much as digits as its factorization.

67777001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14406, while the sum is 35.

The square root of 67777001 is about 8232.6788471311. The cubic root of 67777001 is about 407.7188426440.

The spelling of 67777001 in words is "sixty-seven million, seven hundred seventy-seven thousand, one".