66610050616642 has 16 divisors (see below), whose sum is σ = 113264053680960. Its totient is φ = 29125042374672.

The previous prime is 66610050616621. The next prime is 66610050616657. The reversal of 66610050616642 is 24661605001666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67419079078 + ... + 67419080065.

It is an arithmetic number, because the mean of its divisors is an integer number (7079003355060).

Almost surely, 2^{66610050616642} is an apocalyptic number.

66610050616642 is a deficient number, since it is larger than the sum of its proper divisors (46654003064318).

66610050616642 is a wasteful number, since it uses less digits than its factorization.

66610050616642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134838159177.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 66610050616642 in words is "sixty-six trillion, six hundred ten billion, fifty million, six hundred sixteen thousand, six hundred forty-two".