611664825 has 12 divisors (see below), whose sum is σ = 1011285968. Its totient is φ = 326221200.

The previous prime is 611664793. The next prime is 611664827. The reversal of 611664825 is 528466116.

It is a happy number.

611664825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 611664825 - 2⁵ = 611664793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611664827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4077691 + ... + 4077840.

Almost surely, 2^611664825 is an apocalyptic number.

It is an amenable number.

611664825 is a deficient number, since it is larger than the sum of its proper divisors (399621143).

611664825 is a wasteful number, since it uses less digits than its factorization.

611664825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8155544 (or 8155539 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 611664825 is about 24731.8585027490. The cubic root of 611664825 is about 848.8634521470.

The spelling of 611664825 in words is "six hundred eleven million, six hundred sixty-four thousand, eight hundred twenty-five".