652677661 has 4 divisors (see below), whose sum is σ = 652754524. Its totient is φ = 652600800.

The previous prime is 652677631. The next prime is 652677667. The reversal of 652677661 is 166776256.

652677661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261824761 + 390852900 = 16181^2 + 19770^2 .

It is a cyclic number.

It is not a de Polignac number, because 652677661 - 2⁵ = 652677629 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 (652677667) 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, 23850 + ... + 43291.

It is an arithmetic number, because the mean of its divisors is an integer number (163188631).

Almost surely, 2^652677661 is an apocalyptic number.

It is an amenable number.

652677661 is a deficient number, since it is larger than the sum of its proper divisors (76863).

652677661 is an equidigital number, since it uses as much as digits as its factorization.

652677661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76862.

The product of its digits is 635040, while the sum is 46.

The square root of 652677661 is about 25547.5568499221. The cubic root of 652677661 is about 867.4269601626.

The spelling of 652677661 in words is "six hundred fifty-two million, six hundred seventy-seven thousand, six hundred sixty-one".