645334077 has 8 divisors (see below), whose sum is σ = 862313760. Its totient is φ = 429288560.

The previous prime is 645334061. The next prime is 645334087. The reversal of 645334077 is 770433546.

645334077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 645334077 - 2⁴ = 645334061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645334007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231927 + ... + 234692.

It is an arithmetic number, because the mean of its divisors is an integer number (107789220).

Almost surely, 2^645334077 is an apocalyptic number.

It is an amenable number.

645334077 is a deficient number, since it is larger than the sum of its proper divisors (216979683).

645334077 is a wasteful number, since it uses less digits than its factorization.

645334077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467083.

The product of its (nonzero) digits is 211680, while the sum is 39.

The square root of 645334077 is about 25403.4264814808. The cubic root of 645334077 is about 864.1614054060.

The spelling of 645334077 in words is "six hundred forty-five million, three hundred thirty-four thousand, seventy-seven".