690656811 has 16 divisors (see below), whose sum is σ = 1034831616. Its totient is φ = 406539936.

The previous prime is 690656777. The next prime is 690656839. The reversal of 690656811 is 118656096.

It is a happy number.

It is not a de Polignac number, because 690656811 - 2⁷ = 690656683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690656851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384085 + ... + 385878.

It is an arithmetic number, because the mean of its divisors is an integer number (64676976).

Almost surely, 2^690656811 is an apocalyptic number.

690656811 is a deficient number, since it is larger than the sum of its proper divisors (344174805).

690656811 is a wasteful number, since it uses less digits than its factorization.

690656811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770002.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 690656811 is about 26280.3502830537. The cubic root of 690656811 is about 883.9358872410.

The spelling of 690656811 in words is "six hundred ninety million, six hundred fifty-six thousand, eight hundred eleven".