766747481381 has 32 divisors (see below), whose sum is σ = 927440640000. Its totient is φ = 619224357312.

The previous prime is 766747481377. The next prime is 766747481393. The reversal of 766747481381 is 183184747667.

It is not a de Polignac number, because 766747481381 - 2² = 766747481377 is a prime.

It is a super-2 number, since 2×766747481381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766747481341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80375510 + ... + 80385048.

It is an arithmetic number, because the mean of its divisors is an integer number (28982520000).

Almost surely, 2^766747481381 is an apocalyptic number.

It is an amenable number.

766747481381 is a deficient number, since it is larger than the sum of its proper divisors (160693158619).

766747481381 is a wasteful number, since it uses less digits than its factorization.

766747481381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12801.

The product of its digits is 37933056, while the sum is 62.

The spelling of 766747481381 in words is "seven hundred sixty-six billion, seven hundred forty-seven million, four hundred eighty-one thousand, three hundred eighty-one".