660742276 has 12 divisors (see below), whose sum is σ = 1160415900. Its totient is φ = 329194880.

The previous prime is 660742273. The next prime is 660742289. The reversal of 660742276 is 672247066.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 169676676 + 491065600 = 13026^2 + 22160^2 .

It is a super-4 number, since 4×660742276⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (660742273) 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, 292801 + ... + 295048.

It is an arithmetic number, because the mean of its divisors is an integer number (96701325).

Almost surely, 2^660742276 is an apocalyptic number.

It is an amenable number.

660742276 is a deficient number, since it is larger than the sum of its proper divisors (499673624).

660742276 is a wasteful number, since it uses less digits than its factorization.

660742276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588134 (or 588132 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 660742276 is about 25704.9076248097. The cubic root of 660742276 is about 870.9850453709.

The spelling of 660742276 in words is "six hundred sixty million, seven hundred forty-two thousand, two hundred seventy-six".