690637606 has 16 divisors (see below), whose sum is σ = 1081556064. Its totient is φ = 330134464.

The previous prime is 690637573. The next prime is 690637613. The reversal of 690637606 is 606736096.

It is a super-2 number, since 2×690637606² = 953960605642822472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 174360 + ... + 178276.

It is an arithmetic number, because the mean of its divisors is an integer number (67597254).

Almost surely, 2^690637606 is an apocalyptic number.

690637606 is a deficient number, since it is larger than the sum of its proper divisors (390918458).

690637606 is a wasteful number, since it uses less digits than its factorization.

690637606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 690637606 is about 26279.9848934508. The cubic root of 690637606 is about 883.9276940034.

The spelling of 690637606 in words is "six hundred ninety million, six hundred thirty-seven thousand, six hundred six".