690557667 has 8 divisors (see below), whose sum is σ = 925515024. Its totient is φ = 457986048.

The previous prime is 690557627. The next prime is 690557741. The reversal of 690557667 is 766755096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690557667 - 2⁸ = 690557411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690557627) 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 7 ways as a sum of consecutive naturals, for example, 595758 + ... + 596915.

It is an arithmetic number, because the mean of its divisors is an integer number (115689378).

Almost surely, 2^690557667 is an apocalyptic number.

690557667 is a deficient number, since it is larger than the sum of its proper divisors (234957357).

690557667 is a wasteful number, since it uses less digits than its factorization.

690557667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192869.

The product of its (nonzero) digits is 2381400, while the sum is 51.

The square root of 690557667 is about 26278.4639391270. The cubic root of 690557667 is about 883.8935887931.

The spelling of 690557667 in words is "six hundred ninety million, five hundred fifty-seven thousand, six hundred sixty-seven".