68420465876680 has 16 divisors (see below), whose sum is σ = 153946048222620. Its totient is φ = 27368186350656.

The previous prime is 68420465876551. The next prime is 68420465876699. The reversal of 68420465876680 is 8667856402486.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64884990434884 + 3535475441796 = 8055122^2 + 1880286^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855255823419 + ... + 855255823498.

Almost surely, 2^{68420465876680} is an apocalyptic number.

It is an amenable number.

68420465876680 is an abundant number, since it is smaller than the sum of its proper divisors (85525582345940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68420465876680 is a wasteful number, since it uses less digits than its factorization.

68420465876680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710511646928 (or 1710511646924 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 70.

The spelling of 68420465876680 in words is "sixty-eight trillion, four hundred twenty billion, four hundred sixty-five million, eight hundred seventy-six thousand, six hundred eighty".