61626220166 has 32 divisors (see below), whose sum is σ = 112000253952. Its totient is φ = 24868464480.

The previous prime is 61626220153. The next prime is 61626220189. The reversal of 61626220166 is 66102262616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902806 + ... + 1934921.

It is an arithmetic number, because the mean of its divisors is an integer number (3500007936).

Almost surely, 2^61626220166 is an apocalyptic number.

61626220166 is a deficient number, since it is larger than the sum of its proper divisors (50374033786).

61626220166 is a wasteful number, since it uses less digits than its factorization.

61626220166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837804.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 61626220166 in words is "sixty-one billion, six hundred twenty-six million, two hundred twenty thousand, one hundred sixty-six".