672280681 has 2 divisors, whose sum is σ = 672280682. Its totient is φ = 672280680.

The previous prime is 672280607. The next prime is 672280727. The reversal of 672280681 is 186082276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671846400 + 434281 = 25920^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 672280681 - 2¹⁵ = 672247913 is a prime.

It is a super-2 number, since 2×672280681² = 903922628091647522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (672284681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336140340 + 336140341.

It is an arithmetic number, because the mean of its divisors is an integer number (336140341).

Almost surely, 2^672280681 is an apocalyptic number.

It is an amenable number.

672280681 is a deficient number, since it is larger than the sum of its proper divisors (1).

672280681 is an equidigital number, since it uses as much as digits as its factorization.

672280681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 672280681 is about 25928.3759807667. The cubic root of 672280681 is about 876.0257601906.

The spelling of 672280681 in words is "six hundred seventy-two million, two hundred eighty thousand, six hundred eighty-one".