606610721 has 4 divisors (see below), whose sum is σ = 608971332. Its totient is φ = 604250112.

The previous prime is 606610691. The next prime is 606610727. The reversal of 606610721 is 127016606.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 468289600 + 138321121 = 21640^2 + 11761^2 .

It is a cyclic number.

It is not a de Polignac number, because 606610721 - 2²² = 602416417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (606610727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179920 + ... + 1180433.

It is an arithmetic number, because the mean of its divisors is an integer number (152242833).

Almost surely, 2^606610721 is an apocalyptic number.

It is an amenable number.

606610721 is a deficient number, since it is larger than the sum of its proper divisors (2360611).

606610721 is a wasteful number, since it uses less digits than its factorization.

606610721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360610.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 606610721 is about 24629.4685488745. The cubic root of 606610721 is about 846.5189680944.

The spelling of 606610721 in words is "six hundred six million, six hundred ten thousand, seven hundred twenty-one".