766149780 has 192 divisors, whose sum is σ = 2503581696. Its totient is φ = 173184000.

The previous prime is 766149737. The next prime is 766149781. The reversal of 766149780 is 87941667.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766149781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 621765 + ... + 622995.

It is an arithmetic number, because the mean of its divisors is an integer number (13039488).

Almost surely, 2^766149780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 766149780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251790848).

766149780 is an abundant number, since it is smaller than the sum of its proper divisors (1737431916).

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

766149780 is a wasteful number, since it uses less digits than its factorization.

766149780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 766149780 is about 27679.4107596242. The cubic root of 766149780 is about 915.0353953282.

The spelling of 766149780 in words is "seven hundred sixty-six million, one hundred forty-nine thousand, seven hundred eighty".