766915380 has 144 divisors (see below), whose sum is σ = 2900386944. Its totient is φ = 159356160.

The previous prime is 766915351. The next prime is 766915399. The reversal of 766915380 is 83519667.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13807 + ... + 41526.

It is an arithmetic number, because the mean of its divisors is an integer number (20141576).

Almost surely, 2^766915380 is an apocalyptic number.

766915380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

766915380 is an abundant number, since it is smaller than the sum of its proper divisors (2133471564).

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

766915380 is a wasteful number, since it uses less digits than its factorization.

766915380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55366 (or 55361 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 766915380 is about 27693.2370805581. The cubic root of 766915380 is about 915.3400867854.

The spelling of 766915380 in words is "seven hundred sixty-six million, nine hundred fifteen thousand, three hundred eighty".