660779051 has 2 divisors, whose sum is σ = 660779052. Its totient is φ = 660779050.

The previous prime is 660779039. The next prime is 660779081. The reversal of 660779051 is 150977066.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660779051 is a prime.

It is not a weakly prime, because it can be changed into another prime (660779011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330389525 + 330389526.

It is an arithmetic number, because the mean of its divisors is an integer number (330389526).

Almost surely, 2^660779051 is an apocalyptic number.

660779051 is a deficient number, since it is larger than the sum of its proper divisors (1).

660779051 is an equidigital number, since it uses as much as digits as its factorization.

660779051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 660779051 is about 25705.6229451846. The cubic root of 660779051 is about 871.0012039055.

It can be divided in two parts, 6607 and 79051, that added together give a palindrome (85658).

The spelling of 660779051 in words is "six hundred sixty million, seven hundred seventy-nine thousand, fifty-one".