766640726337 has 8 divisors (see below), whose sum is σ = 1022231026080. Its totient is φ = 511072122080.

The previous prime is 766640726317. The next prime is 766640726377. The reversal of 766640726337 is 733627046667.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 766640726337 - 2⁷ = 766640726209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766640726317) 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 7 ways as a sum of consecutive naturals, for example, 5341239 + ... + 5482892.

It is an arithmetic number, because the mean of its divisors is an integer number (127778878260).

Almost surely, 2^766640726337 is an apocalyptic number.

It is an amenable number.

766640726337 is a deficient number, since it is larger than the sum of its proper divisors (255590299743).

766640726337 is a wasteful number, since it uses less digits than its factorization.

766640726337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10847743.

The product of its (nonzero) digits is 32006016, while the sum is 57.

The spelling of 766640726337 in words is "seven hundred sixty-six billion, six hundred forty million, seven hundred twenty-six thousand, three hundred thirty-seven".