766402551 has 12 divisors (see below), whose sum is σ = 1172145312. Its totient is φ = 480879936.

The previous prime is 766402543. The next prime is 766402561. The reversal of 766402551 is 155204667.

It is a happy number.

766402551 is a `hidden beast` number, since 7 + 6 + 640 + 2 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 766402551 - 2³ = 766402543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766402501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2504431 + ... + 2504736.

It is an arithmetic number, because the mean of its divisors is an integer number (97678776).

Almost surely, 2^766402551 is an apocalyptic number.

766402551 is a deficient number, since it is larger than the sum of its proper divisors (405742761).

766402551 is a wasteful number, since it uses less digits than its factorization.

766402551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009190 (or 5009187 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 766402551 is about 27683.9764304191. The cubic root of 766402551 is about 915.1360148964.

The spelling of 766402551 in words is "seven hundred sixty-six million, four hundred two thousand, five hundred fifty-one".