766475451381 has 8 divisors (see below), whose sum is σ = 1022241049120. Its totient is φ = 510846743952.

The previous prime is 766475451373. The next prime is 766475451397. The reversal of 766475451381 is 183154574667.

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

It is not a de Polignac number, because 766475451381 - 2³ = 766475451373 is a prime.

It is a super-2 number, since 2×766475451381² (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 (766475451311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34209511 + ... + 34231908.

It is an arithmetic number, because the mean of its divisors is an integer number (127780131140).

Almost surely, 2^766475451381 is an apocalyptic number.

It is an amenable number.

766475451381 is a deficient number, since it is larger than the sum of its proper divisors (255765597739).

766475451381 is a wasteful number, since it uses less digits than its factorization.

766475451381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68445155.

The product of its digits is 16934400, while the sum is 57.

The spelling of 766475451381 in words is "seven hundred sixty-six billion, four hundred seventy-five million, four hundred fifty-one thousand, three hundred eighty-one".