66288472031 has 8 divisors (see below), whose sum is σ = 69784057200. Its totient is φ = 62793558720.

The previous prime is 66288472027. The next prime is 66288472037. The reversal of 66288472031 is 13027488266.

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

It is a cyclic number.

It is not a de Polignac number, because 66288472031 - 2² = 66288472027 is a prime.

It is a super-2 number, since 2×66288472031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66288472037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41261 + ... + 366441.

It is an arithmetic number, because the mean of its divisors is an integer number (8723007150).

Almost surely, 2^66288472031 is an apocalyptic number.

66288472031 is a deficient number, since it is larger than the sum of its proper divisors (3495585169).

66288472031 is a wasteful number, since it uses less digits than its factorization.

66288472031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335929.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 66288472031 in words is "sixty-six billion, two hundred eighty-eight million, four hundred seventy-two thousand, thirty-one".