770540661 has 16 divisors (see below), whose sum is σ = 1245318720. Its totient is φ = 466994160.

The previous prime is 770540647. The next prime is 770540663. The reversal of 770540661 is 166045077.

It is not a de Polignac number, because 770540661 - 2⁵ = 770540629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770540663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1296910 + ... + 1297503.

It is an arithmetic number, because the mean of its divisors is an integer number (77832420).

Almost surely, 2^770540661 is an apocalyptic number.

It is an amenable number.

770540661 is a deficient number, since it is larger than the sum of its proper divisors (474778059).

770540661 is a wasteful number, since it uses less digits than its factorization.

770540661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594433 (or 2594427 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 770540661 is about 27758.6141765038. The cubic root of 770540661 is about 916.7801196143.

The spelling of 770540661 in words is "seven hundred seventy million, five hundred forty thousand, six hundred sixty-one".