766066521 has 32 divisors (see below), whose sum is σ = 1138838400. Its totient is φ = 454164480.

The previous prime is 766066507. The next prime is 766066541. The reversal of 766066521 is 125660667.

It is not a de Polignac number, because 766066521 - 2¹⁴ = 766050137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766066521.

It is not an unprimeable number, because it can be changed into a prime (766066501) 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, 283545 + ... + 286233.

It is an arithmetic number, because the mean of its divisors is an integer number (35588700).

Almost surely, 2^766066521 is an apocalyptic number.

It is an amenable number.

766066521 is a deficient number, since it is larger than the sum of its proper divisors (372771879).

766066521 is a wasteful number, since it uses less digits than its factorization.

766066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 766066521 is about 27677.9067308205. The cubic root of 766066521 is about 915.0022478968.

The spelling of 766066521 in words is "seven hundred sixty-six million, sixty-six thousand, five hundred twenty-one".