771087660 has 48 divisors (see below), whose sum is σ = 2467481856. Its totient is φ = 176248512.

The previous prime is 771087643. The next prime is 771087671. The reversal of 771087660 is 66780177.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917542 + ... + 918381.

It is an arithmetic number, because the mean of its divisors is an integer number (51405872).

Almost surely, 2^771087660 is an apocalyptic number.

771087660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

771087660 is an abundant number, since it is smaller than the sum of its proper divisors (1696394196).

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

771087660 is a wasteful number, since it uses less digits than its factorization.

771087660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835942 (or 1835940 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 771087660 is about 27768.4652078576. The cubic root of 771087660 is about 916.9970059367.

The spelling of 771087660 in words is "seven hundred seventy-one million, eighty-seven thousand, six hundred sixty".