766769940 has 36 divisors (see below), whose sum is σ = 2325869364. Its totient is φ = 204471936.

The previous prime is 766769917. The next prime is 766769953. The reversal of 766769940 is 49967667.

It can be written as a sum of positive squares in 2 ways, for example, as 330294276 + 436475664 = 18174^2 + 20892^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×766769940² = 1175872281775207200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2129737 + ... + 2130096.

Almost surely, 2^766769940 is an apocalyptic number.

It is an amenable number.

766769940 is an abundant number, since it is smaller than the sum of its proper divisors (1559099424).

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

766769940 is a wasteful number, since it uses less digits than its factorization.

766769940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259848 (or 4259843 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 766769940 is about 27690.6110441789. The cubic root of 766769940 is about 915.2822205670.

The spelling of 766769940 in words is "seven hundred sixty-six million, seven hundred sixty-nine thousand, nine hundred forty".