771391066 has 16 divisors (see below), whose sum is σ = 1208136384. Its totient is φ = 368699584.

The previous prime is 771391007. The next prime is 771391079. The reversal of 771391066 is 660193177.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89106 + ... + 97378.

It is an arithmetic number, because the mean of its divisors is an integer number (75508524).

Almost surely, 2^771391066 is an apocalyptic number.

771391066 is a deficient number, since it is larger than the sum of its proper divisors (436745318).

771391066 is a wasteful number, since it uses less digits than its factorization.

771391066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10325.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 771391066 is about 27773.9278100884. The cubic root of 771391066 is about 917.1172628692.

The spelling of 771391066 in words is "seven hundred seventy-one million, three hundred ninety-one thousand, sixty-six".