690656067 has 12 divisors (see below), whose sum is σ = 1020815224. Its totient is φ = 449729280.

The previous prime is 690656063. The next prime is 690656069. The reversal of 690656067 is 760656096.

It is not a de Polignac number, because 690656067 - 2² = 690656063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690656063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 891934 + ... + 892707.

Almost surely, 2^690656067 is an apocalyptic number.

690656067 is a deficient number, since it is larger than the sum of its proper divisors (330159157).

690656067 is a wasteful number, since it uses less digits than its factorization.

690656067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784690 (or 1784687 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 690656067 is about 26280.3361279874. The cubic root of 690656067 is about 883.9355698385.

The spelling of 690656067 in words is "six hundred ninety million, six hundred fifty-six thousand, sixty-seven".