770664021 has 8 divisors (see below), whose sum is σ = 1028309184. Its totient is φ = 513397440.

The previous prime is 770664007. The next prime is 770664023. The reversal of 770664021 is 120466077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 770664021 - 2¹¹ = 770661973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770664023) 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 7 ways as a sum of consecutive naturals, for example, 89860 + ... + 98061.

It is an arithmetic number, because the mean of its divisors is an integer number (128538648).

Almost surely, 2^770664021 is an apocalyptic number.

It is an amenable number.

770664021 is a deficient number, since it is larger than the sum of its proper divisors (257645163).

770664021 is a wasteful number, since it uses less digits than its factorization.

770664021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189291.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 770664021 is about 27760.8361005212. The cubic root of 770664021 is about 916.8290410909.

The spelling of 770664021 in words is "seven hundred seventy million, six hundred sixty-four thousand, twenty-one".