671066783 has 4 divisors (see below), whose sum is σ = 671120520. Its totient is φ = 671013048.

The previous prime is 671066779. The next prime is 671066797. The reversal of 671066783 is 387660176.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 671066783 - 2² = 671066779 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 (671006783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2741 + ... + 36737.

It is an arithmetic number, because the mean of its divisors is an integer number (167780130).

Almost surely, 2^671066783 is an apocalyptic number.

671066783 is a deficient number, since it is larger than the sum of its proper divisors (53737).

671066783 is a wasteful number, since it uses less digits than its factorization.

671066783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53736.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 671066783 is about 25904.9567264645. The cubic root of 671066783 is about 875.4981796554.

The spelling of 671066783 in words is "six hundred seventy-one million, sixty-six thousand, seven hundred eighty-three".