610666501 has 4 divisors (see below), whose sum is σ = 611363692. Its totient is φ = 609969312.

The previous prime is 610666493. The next prime is 610666513. The reversal of 610666501 is 105666016.

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 503957601 + 106708900 = 22449^2 + 10330^2 .

It is a cyclic number.

It is not a de Polignac number, because 610666501 - 2³ = 610666493 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 (610666531) 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, 347280 + ... + 349033.

It is an arithmetic number, because the mean of its divisors is an integer number (152840923).

Almost surely, 2^610666501 is an apocalyptic number.

It is an amenable number.

610666501 is a deficient number, since it is larger than the sum of its proper divisors (697191).

610666501 is an equidigital number, since it uses as much as digits as its factorization.

610666501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697190.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 610666501 is about 24711.6673051415. The cubic root of 610666501 is about 848.4013786993.

The spelling of 610666501 in words is "six hundred ten million, six hundred sixty-six thousand, five hundred one".