690866556628 has 12 divisors (see below), whose sum is σ = 1210485515680. Its totient is φ = 345013552152.

The previous prime is 690866556593. The next prime is 690866556631. The reversal of 690866556628 is 826655668096.

690866556628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 104927838 + ... + 104934421.

Almost surely, 2^690866556628 is an apocalyptic number.

It is an amenable number.

690866556628 is a deficient number, since it is larger than the sum of its proper divisors (519618959052).

690866556628 is a wasteful number, since it uses less digits than its factorization.

690866556628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209863086 (or 209863084 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 67.

The spelling of 690866556628 in words is "six hundred ninety billion, eight hundred sixty-six million, five hundred fifty-six thousand, six hundred twenty-eight".