66036653431 has 32 divisors (see below), whose sum is σ = 77318258688. Its totient is φ = 55235489760.

The previous prime is 66036653407. The next prime is 66036653447. The reversal of 66036653431 is 13435663066.

It is a cyclic number.

It is not a de Polignac number, because 66036653431 - 2⁵ = 66036653399 is a prime.

It is a super-2 number, since 2×66036653431² (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 (66036653531) 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, 23557876 + ... + 23560678.

It is an arithmetic number, because the mean of its divisors is an integer number (2416195584).

Almost surely, 2^66036653431 is an apocalyptic number.

66036653431 is a deficient number, since it is larger than the sum of its proper divisors (11281605257).

66036653431 is a wasteful number, since it uses less digits than its factorization.

66036653431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331.

The product of its (nonzero) digits is 699840, while the sum is 43.

The spelling of 66036653431 in words is "sixty-six billion, thirty-six million, six hundred fifty-three thousand, four hundred thirty-one".