766737281055 has 16 divisors (see below), whose sum is σ = 1229933334240. Its totient is φ = 407875321728.

The previous prime is 766737280997. The next prime is 766737281059. The reversal of 766737281055 is 550182737667.

It is not a de Polignac number, because 766737281055 - 2²² = 766733086751 is a prime.

It is a super-2 number, since 2×766737281055² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 766737280986 and 766737281004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766737281059) 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, 65695732 + ... + 65707401.

It is an arithmetic number, because the mean of its divisors is an integer number (76870833390).

Almost surely, 2^766737281055 is an apocalyptic number.

766737281055 is a deficient number, since it is larger than the sum of its proper divisors (463196053185).

766737281055 is a wasteful number, since it uses less digits than its factorization.

766737281055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131403530.

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 766737281055 in words is "seven hundred sixty-six billion, seven hundred thirty-seven million, two hundred eighty-one thousand, fifty-five".