660777077433 has 32 divisors (see below), whose sum is σ = 1017786418560. Its totient is φ = 376869749760.

The previous prime is 660777077339. The next prime is 660777077449. The reversal of 660777077433 is 334770777066.

It is not a de Polignac number, because 660777077433 - 2¹² = 660777073337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660777077333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5072763 + ... + 5201391.

It is an arithmetic number, because the mean of its divisors is an integer number (31805825580).

Almost surely, 2^660777077433 is an apocalyptic number.

It is an amenable number.

660777077433 is a deficient number, since it is larger than the sum of its proper divisors (357009341127).

660777077433 is a wasteful number, since it uses less digits than its factorization.

660777077433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137817.

The product of its (nonzero) digits is 21781872, while the sum is 57.

The spelling of 660777077433 in words is "six hundred sixty billion, seven hundred seventy-seven million, seventy-seven thousand, four hundred thirty-three".