780151668 has 12 divisors (see below), whose sum is σ = 1820353920. Its totient is φ = 260050552.

The previous prime is 780151667. The next prime is 780151681. The reversal of 780151668 is 866151087.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780151663) 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 3 ways as a sum of consecutive naturals, for example, 32506308 + ... + 32506331.

It is an arithmetic number, because the mean of its divisors is an integer number (151696160).

Almost surely, 2^780151668 is an apocalyptic number.

It is an amenable number.

780151668 is an abundant number, since it is smaller than the sum of its proper divisors (1040202252).

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

780151668 is a wasteful number, since it uses less digits than its factorization.

780151668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65012646 (or 65012644 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 780151668 is about 27931.1952483241. The cubic root of 780151668 is about 920.5760680099.

The spelling of 780151668 in words is "seven hundred eighty million, one hundred fifty-one thousand, six hundred sixty-eight".