660851049 has 4 divisors (see below), whose sum is σ = 881134736. Its totient is φ = 440567364.

The previous prime is 660851041. The next prime is 660851071. The reversal of 660851049 is 940158066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 660851049 - 2³ = 660851041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660850998 and 660851016.

It is not an unprimeable number, because it can be changed into a prime (660851041) 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, 110141839 + ... + 110141844.

It is an arithmetic number, because the mean of its divisors is an integer number (220283684).

Almost surely, 2^660851049 is an apocalyptic number.

It is an amenable number.

660851049 is a deficient number, since it is larger than the sum of its proper divisors (220283687).

660851049 is a wasteful number, since it uses less digits than its factorization.

660851049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220283686.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 660851049 is about 25707.0233399357. The cubic root of 660851049 is about 871.0328373071.

The spelling of 660851049 in words is "six hundred sixty million, eight hundred fifty-one thousand, forty-nine".