690774608673 has 12 divisors (see below), whose sum is σ = 1008996620580. Its totient is φ = 455342063616.

The previous prime is 690774608617. The next prime is 690774608681. The reversal of 690774608673 is 376806477096.

690774608673 is a `hidden beast` number, since 6 + 90 + 7 + 7 + 460 + 86 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 115676852769 + 575097755904 = 340113^2 + 758352^2 .

It is not a de Polignac number, because 690774608673 - 2²¹ = 690772511521 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 690774608673.

It is not an unprimeable number, because it can be changed into a prime (690774608473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431194336 + ... + 431195937.

It is an arithmetic number, because the mean of its divisors is an integer number (84083051715).

Almost surely, 2^690774608673 is an apocalyptic number.

It is an amenable number.

690774608673 is a deficient number, since it is larger than the sum of its proper divisors (318222011907).

690774608673 is a wasteful number, since it uses less digits than its factorization.

690774608673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862390368 (or 862390365 counting only the distinct ones).

The product of its (nonzero) digits is 64012032, while the sum is 63.

The spelling of 690774608673 in words is "six hundred ninety billion, seven hundred seventy-four million, six hundred eight thousand, six hundred seventy-three".