66716050040 has 16 divisors (see below), whose sum is σ = 150111112680. Its totient is φ = 26686420000.

The previous prime is 66716050039. The next prime is 66716050073. The reversal of 66716050040 is 4005061766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833950586 + ... + 833950665.

Almost surely, 2^66716050040 is an apocalyptic number.

It is an amenable number.

66716050040 is an abundant number, since it is smaller than the sum of its proper divisors (83395062640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66716050040 is a wasteful number, since it uses less digits than its factorization.

66716050040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667901262 (or 1667901258 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 66716050040 in words is "sixty-six billion, seven hundred sixteen million, fifty thousand, forty".