766669620 has 24 divisors (see below), whose sum is σ = 2146675104. Its totient is φ = 204445216.

The previous prime is 766669613. The next prime is 766669639. The reversal of 766669620 is 26966667.

It is a self number, because there is not a number n which added to its sum of digits gives 766669620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6388854 + ... + 6388973.

It is an arithmetic number, because the mean of its divisors is an integer number (89444796).

Almost surely, 2^766669620 is an apocalyptic number.

It is an amenable number.

766669620 is an abundant number, since it is smaller than the sum of its proper divisors (1380005484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766669620 is a wasteful number, since it uses less digits than its factorization.

766669620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12777839 (or 12777837 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 766669620 is about 27688.7995406085. The cubic root of 766669620 is about 915.2423019802.

The spelling of 766669620 in words is "seven hundred sixty-six million, six hundred sixty-nine thousand, six hundred twenty".