66031189497238 has 24 divisors (see below), whose sum is σ = 116358456999744. Its totient is φ = 28018892286000.

The previous prime is 66031189497199. The next prime is 66031189497239. The reversal of 66031189497238 is 83279498113066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031189497239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3335572518 + ... + 3335592313.

It is an arithmetic number, because the mean of its divisors is an integer number (4848269041656).

Almost surely, 2^{66031189497238} is an apocalyptic number.

66031189497238 is a deficient number, since it is larger than the sum of its proper divisors (50327267502506).

66031189497238 is a wasteful number, since it uses less digits than its factorization.

66031189497238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671164948 (or 6671164941 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 66031189497238 in words is "sixty-six trillion, thirty-one billion, one hundred eighty-nine million, four hundred ninety-seven thousand, two hundred thirty-eight".