66067431 has 8 divisors (see below), whose sum is σ = 91920000. Its totient is φ = 42129912.

The previous prime is 66067429. The next prime is 66067439. The reversal of 66067431 is 13476066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66067431 - 2¹ = 66067429 is a prime.

It is a super-2 number, since 2×66067431² = 8729810877879522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66067392 and 66067401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66067439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478681 + ... + 478818.

It is an arithmetic number, because the mean of its divisors is an integer number (11490000).

Almost surely, 2^66067431 is an apocalyptic number.

66067431 is a deficient number, since it is larger than the sum of its proper divisors (25852569).

66067431 is a wasteful number, since it uses less digits than its factorization.

66067431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957525.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66067431 is about 8128.1874363231. The cubic root of 66067431 is about 404.2615839330.

It can be divided in two parts, 6606 and 7431, that multiplied together give a triangular number (49089186 = T₉₉₀₈).

The spelling of 66067431 in words is "sixty-six million, sixty-seven thousand, four hundred thirty-one".