61666622 has 8 divisors (see below), whose sum is σ = 92546472. Its totient is φ = 30817800.

The previous prime is 61666589. The next prime is 61666639. The reversal of 61666622 is 22666616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904 + ... + 11267.

It is an arithmetic number, because the mean of its divisors is an integer number (11568309).

Almost surely, 2^61666622 is an apocalyptic number.

61666622 is a deficient number, since it is larger than the sum of its proper divisors (30879850).

61666622 is a wasteful number, since it uses less digits than its factorization.

61666622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15514.

The product of its digits is 31104, while the sum is 35.

The square root of 61666622 is about 7852.8098156010. The cubic root of 61666622 is about 395.0784910515.

The spelling of 61666622 in words is "sixty-one million, six hundred sixty-six thousand, six hundred twenty-two".