666733340739 has 16 divisors (see below), whose sum is σ = 910345651200. Its totient is φ = 433931399616.

The previous prime is 666733340731. The next prime is 666733340753. The reversal of 666733340739 is 937043337666.

666733340739 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666733340739 - 2³ = 666733340731 is a prime.

It is a super-2 number, since 2×666733340739² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666733340731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15783519 + ... + 15825704.

It is an arithmetic number, because the mean of its divisors is an integer number (56896603200).

Almost surely, 2^666733340739 is an apocalyptic number.

666733340739 is a deficient number, since it is larger than the sum of its proper divisors (243612310461).

666733340739 is a wasteful number, since it uses less digits than its factorization.

666733340739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31609394.

The product of its (nonzero) digits is 30862944, while the sum is 57.

The spelling of 666733340739 in words is "six hundred sixty-six billion, seven hundred thirty-three million, three hundred forty thousand, seven hundred thirty-nine".