66048431 has 4 divisors (see below), whose sum is σ = 66139272. Its totient is φ = 65957592.

The previous prime is 66048419. The next prime is 66048439. The reversal of 66048431 is 13484066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66048431 is a prime.

It is a super-2 number, since 2×66048431² = 8724790475123522, which 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 (66048439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44321 + ... + 45786.

It is an arithmetic number, because the mean of its divisors is an integer number (16534818).

Almost surely, 2^66048431 is an apocalyptic number.

66048431 is a deficient number, since it is larger than the sum of its proper divisors (90841).

66048431 is an equidigital number, since it uses as much as digits as its factorization.

66048431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90840.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 66048431 is about 8127.0185800206. The cubic root of 66048431 is about 404.2228270326. Note that the first 3 decimals are identical.

The spelling of 66048431 in words is "sixty-six million, forty-eight thousand, four hundred thirty-one".