66335919051 has 32 divisors (see below), whose sum is σ = 90734865408. Its totient is φ = 43089384960.

The previous prime is 66335918959. The next prime is 66335919157. The reversal of 66335919051 is 15091953366.

It is not a de Polignac number, because 66335919051 - 2⁷ = 66335918923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66335119051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51382716 + ... + 51384006.

It is an arithmetic number, because the mean of its divisors is an integer number (2835464544).

Almost surely, 2^66335919051 is an apocalyptic number.

66335919051 is a deficient number, since it is larger than the sum of its proper divisors (24398946357).

66335919051 is a wasteful number, since it uses less digits than its factorization.

66335919051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691.

The product of its (nonzero) digits is 656100, while the sum is 48.

The spelling of 66335919051 in words is "sixty-six billion, three hundred thirty-five million, nine hundred nineteen thousand, fifty-one".