66497838031 has 4 divisors (see below), whose sum is σ = 66501015592. Its totient is φ = 66494660472.

The previous prime is 66497837929. The next prime is 66497838037. The reversal of 66497838031 is 13083879466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66497838031 - 2²⁷ = 66363620303 is a prime.

It is a super-2 number, since 2×66497838031² (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 (66497838037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557180 + ... + 1599313.

It is an arithmetic number, because the mean of its divisors is an integer number (16625253898).

Almost surely, 2^66497838031 is an apocalyptic number.

66497838031 is a deficient number, since it is larger than the sum of its proper divisors (3177561).

66497838031 is a wasteful number, since it uses less digits than its factorization.

66497838031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177560.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 66497838031 in words is "sixty-six billion, four hundred ninety-seven million, eight hundred thirty-eight thousand, thirty-one".