206425312066 has 16 divisors (see below), whose sum is σ = 313002233856. Its totient is φ = 102096058176.

The previous prime is 206425312057. The next prime is 206425312091. The reversal of 206425312066 is 660213524602.

It is a super-2 number, since 2×206425312066² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120186 + ... + 1291381.

It is an arithmetic number, because the mean of its divisors is an integer number (19562639616).

Almost surely, 2^206425312066 is an apocalyptic number.

206425312066 is a deficient number, since it is larger than the sum of its proper divisors (106576921790).

206425312066 is a wasteful number, since it uses less digits than its factorization.

206425312066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412033.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 206425312066 its reverse (660213524602), we get a palindrome (866638836668).

The spelling of 206425312066 in words is "two hundred six billion, four hundred twenty-five million, three hundred twelve thousand, sixty-six".