646770693 has 8 divisors (see below), whose sum is σ = 885668128. Its totient is φ = 419526864.

The previous prime is 646770671. The next prime is 646770721. The reversal of 646770693 is 396077646.

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

It is not a de Polignac number, because 646770693 - 2⁶ = 646770629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646770623) 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, 2913271 + ... + 2913492.

It is an arithmetic number, because the mean of its divisors is an integer number (110708516).

Almost surely, 2^646770693 is an apocalyptic number.

It is an amenable number.

646770693 is a deficient number, since it is larger than the sum of its proper divisors (238897435).

646770693 is a wasteful number, since it uses less digits than its factorization.

646770693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826803.

The product of its (nonzero) digits is 1143072, while the sum is 48.

The square root of 646770693 is about 25431.6867903016. The cubic root of 646770693 is about 864.8021835954.

The spelling of 646770693 in words is "six hundred forty-six million, seven hundred seventy thousand, six hundred ninety-three".