690660553 has 8 divisors (see below), whose sum is σ = 755389440. Its totient is φ = 626255280.

The previous prime is 690660541. The next prime is 690660557. The reversal of 690660553 is 355066096.

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

It is a cyclic number.

It is not a de Polignac number, because 690660553 - 2⁵ = 690660521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690660557) 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, 76425 + ... + 84982.

It is an arithmetic number, because the mean of its divisors is an integer number (94423680).

Almost surely, 2^690660553 is an apocalyptic number.

It is an amenable number.

690660553 is a deficient number, since it is larger than the sum of its proper divisors (64728887).

690660553 is a wasteful number, since it uses less digits than its factorization.

690660553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161807.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 690660553 is about 26280.4214768333. The cubic root of 690660553 is about 883.9374836354.

The spelling of 690660553 in words is "six hundred ninety million, six hundred sixty thousand, five hundred fifty-three".