667769701 has 2 divisors, whose sum is σ = 667769702. Its totient is φ = 667769700.

The previous prime is 667769671. The next prime is 667769719. The reversal of 667769701 is 107967766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655308801 + 12460900 = 25599^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 667769701 - 2¹⁵ = 667736933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667769731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333884850 + 333884851.

It is an arithmetic number, because the mean of its divisors is an integer number (333884851).

Almost surely, 2^667769701 is an apocalyptic number.

It is an amenable number.

667769701 is a deficient number, since it is larger than the sum of its proper divisors (1).

667769701 is an equidigital number, since it uses as much as digits as its factorization.

667769701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 667769701 is about 25841.2403146598. The cubic root of 667769701 is about 874.0619938850.

The spelling of 667769701 in words is "six hundred sixty-seven million, seven hundred sixty-nine thousand, seven hundred one".