690476566 has 16 divisors (see below), whose sum is σ = 1116216864. Its totient is φ = 318443904.

The previous prime is 690476557. The next prime is 690476581. The reversal of 690476566 is 665674096.

690476566 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 7 ways as a sum of consecutive naturals, for example, 28446 + ... + 46798.

It is an arithmetic number, because the mean of its divisors is an integer number (69763554).

Almost surely, 2^690476566 is an apocalyptic number.

690476566 is a deficient number, since it is larger than the sum of its proper divisors (425740298).

690476566 is a wasteful number, since it uses less digits than its factorization.

690476566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19815.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The square root of 690476566 is about 26276.9207861195. The cubic root of 690476566 is about 883.8589851368.

The spelling of 690476566 in words is "six hundred ninety million, four hundred seventy-six thousand, five hundred sixty-six".