614550661 has 4 divisors (see below), whose sum is σ = 624625324. Its totient is φ = 604476000.

The previous prime is 614550641. The next prime is 614550683. The reversal of 614550661 is 166055416.

It is a happy number.

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 20702500 + 593848161 = 4550^2 + 24369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-614550661 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 (614550641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5037240 + ... + 5037361.

It is an arithmetic number, because the mean of its divisors is an integer number (156156331).

Almost surely, 2^614550661 is an apocalyptic number.

614550661 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

614550661 is a deficient number, since it is larger than the sum of its proper divisors (10074663).

614550661 is a wasteful number, since it uses less digits than its factorization.

614550661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10074662.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 614550661 is about 24790.1323312321. The cubic root of 614550661 is about 850.1963380362.

The spelling of 614550661 in words is "six hundred fourteen million, five hundred fifty thousand, six hundred sixty-one".