672277778437 has 2 divisors, whose sum is σ = 672277778438. Its totient is φ = 672277778436.

The previous prime is 672277778413. The next prime is 672277778477. The reversal of 672277778437 is 734877772276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339526470721 + 332751307716 = 582689^2 + 576846^2 .

It is a cyclic number.

It is not a de Polignac number, because 672277778437 - 2³¹ = 670130294789 is a prime.

It is a super-2 number, since 2×672277778437² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672277778477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336138889218 + 336138889219.

It is an arithmetic number, because the mean of its divisors is an integer number (336138889219).

Almost surely, 2^672277778437 is an apocalyptic number.

It is an amenable number.

672277778437 is a deficient number, since it is larger than the sum of its proper divisors (1).

672277778437 is an equidigital number, since it uses as much as digits as its factorization.

672277778437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 271063296, while the sum is 67.

The spelling of 672277778437 in words is "six hundred seventy-two billion, two hundred seventy-seven million, seven hundred seventy-eight thousand, four hundred thirty-seven".