672708821377 has 2 divisors, whose sum is σ = 672708821378. Its totient is φ = 672708821376.

The previous prime is 672708821321. The next prime is 672708821399. The reversal of 672708821377 is 773128807276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395610808576 + 277098012801 = 628976^2 + 526401^2 .

It is a cyclic number.

It is not a de Polignac number, because 672708821377 - 2³¹ = 670561337729 is a prime.

It is a super-2 number, since 2×672708821377² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (672708821677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336354410688 + 336354410689.

It is an arithmetic number, because the mean of its divisors is an integer number (336354410689).

Almost surely, 2^672708821377 is an apocalyptic number.

It is an amenable number.

672708821377 is a deficient number, since it is larger than the sum of its proper divisors (1).

672708821377 is an equidigital number, since it uses as much as digits as its factorization.

672708821377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11063808, while the sum is 58.

The spelling of 672708821377 in words is "six hundred seventy-two billion, seven hundred eight million, eight hundred twenty-one thousand, three hundred seventy-seven".