66853974031 has 16 divisors (see below), whose sum is σ = 74135706624. Its totient is φ = 59886549504.

The previous prime is 66853973959. The next prime is 66853974067. The reversal of 66853974031 is 13047935866.

It is a happy number.

66853974031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66853974031 - 2¹⁹ = 66853449743 is a prime.

It is a super-2 number, since 2×66853974031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66853974031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66853974091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2775 + ... + 365671.

It is an arithmetic number, because the mean of its divisors is an integer number (4633481664).

Almost surely, 2^66853974031 is an apocalyptic number.

66853974031 is a deficient number, since it is larger than the sum of its proper divisors (7281732593).

66853974031 is a wasteful number, since it uses less digits than its factorization.

66853974031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363330.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 66853974031 in words is "sixty-six billion, eight hundred fifty-three million, nine hundred seventy-four thousand, thirty-one".