766473750997 has 4 divisors (see below), whose sum is σ = 766478699116. Its totient is φ = 766468802880.

The previous prime is 766473750967. The next prime is 766473751061. The reversal of 766473750997 is 799057374667.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 487303121041 + 279170629956 = 698071^2 + 528366^2 .

It is a cyclic number.

It is not a de Polignac number, because 766473750997 - 2⁷ = 766473750869 is a prime.

It is a super-2 number, since 2×766473750997² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766473750907) 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, 2233938 + ... + 2554099.

It is an arithmetic number, because the mean of its divisors is an integer number (191619674779).

Almost surely, 2^766473750997 is an apocalyptic number.

It is an amenable number.

766473750997 is a deficient number, since it is larger than the sum of its proper divisors (4948119).

766473750997 is a wasteful number, since it uses less digits than its factorization.

766473750997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4948118.

The product of its (nonzero) digits is 420078960, while the sum is 70.

The spelling of 766473750997 in words is "seven hundred sixty-six billion, four hundred seventy-three million, seven hundred fifty thousand, nine hundred ninety-seven".