602551661 has 8 divisors (see below), whose sum is σ = 609444000. Its totient is φ = 595694320.

The previous prime is 602551657. The next prime is 602551667. The reversal of 602551661 is 166155206.

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 602551661 - 2² = 602551657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (602551667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26690 + ... + 43788.

It is an arithmetic number, because the mean of its divisors is an integer number (76180500).

Almost surely, 2^602551661 is an apocalyptic number.

It is an amenable number.

602551661 is a deficient number, since it is larger than the sum of its proper divisors (6892339).

602551661 is a wasteful number, since it uses less digits than its factorization.

602551661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17499.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 602551661 is about 24546.9277303698. The cubic root of 602551661 is about 844.6266156100.

It can be divided in two parts, 60255 and 1661, that added together give a palindrome (61916).

The spelling of 602551661 in words is "six hundred two million, five hundred fifty-one thousand, six hundred sixty-one".