612850661 has 2 divisors, whose sum is σ = 612850662. Its totient is φ = 612850660.

The previous prime is 612850639. The next prime is 612850717. The reversal of 612850661 is 166058216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591413761 + 21436900 = 24319^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 612850661 - 2¹⁸ = 612588517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612810661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306425330 + 306425331.

It is an arithmetic number, because the mean of its divisors is an integer number (306425331).

Almost surely, 2^612850661 is an apocalyptic number.

It is an amenable number.

612850661 is a deficient number, since it is larger than the sum of its proper divisors (1).

612850661 is an equidigital number, since it uses as much as digits as its factorization.

612850661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 612850661 is about 24755.8207498762. The cubic root of 612850661 is about 849.4116625348.

The spelling of 612850661 in words is "six hundred twelve million, eight hundred fifty thousand, six hundred sixty-one".