61666062442 has 8 divisors (see below), whose sum is σ = 92500158276. Its totient is φ = 30832676352.

The previous prime is 61666062371. The next prime is 61666062467. The reversal of 61666062442 is 24426066616.

It can be written as a sum of positive squares in 2 ways, for example, as 61638489441 + 27573001 = 248271^2 + 5251^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202408 + ... + 405340.

Almost surely, 2^61666062442 is an apocalyptic number.

61666062442 is a deficient number, since it is larger than the sum of its proper divisors (30834095834).

61666062442 is a wasteful number, since it uses less digits than its factorization.

61666062442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354872.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 61666062442 in words is "sixty-one billion, six hundred sixty-six million, sixty-two thousand, four hundred forty-two".