770628661 has 32 divisors (see below), whose sum is σ = 886152960. Its totient is φ = 664012800.

The previous prime is 770628643. The next prime is 770628697. The reversal of 770628661 is 166826077.

It is not a de Polignac number, because 770628661 - 2²³ = 762240053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770628601) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2930016 + ... + 2930278.

It is an arithmetic number, because the mean of its divisors is an integer number (27692280).

Almost surely, 2^770628661 is an apocalyptic number.

It is an amenable number.

770628661 is a deficient number, since it is larger than the sum of its proper divisors (115524299).

770628661 is a wasteful number, since it uses less digits than its factorization.

770628661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 770628661 is about 27760.1992247894. The cubic root of 770628661 is about 916.8150187371.

The spelling of 770628661 in words is "seven hundred seventy million, six hundred twenty-eight thousand, six hundred sixty-one".