66431035 has 16 divisors (see below), whose sum is σ = 87130080. Its totient is φ = 48221440.

The previous prime is 66431023. The next prime is 66431039. The reversal of 66431035 is 53013466.

It is not a de Polignac number, because 66431035 - 2⁵ = 66431003 is a prime.

It is a super-2 number, since 2×66431035² = 8826164822342450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66430994 and 66431012.

It is not an unprimeable number, because it can be changed into a prime (66431039) 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, 43749 + ... + 45241.

It is an arithmetic number, because the mean of its divisors is an integer number (5445630).

Almost surely, 2^66431035 is an apocalyptic number.

66431035 is a deficient number, since it is larger than the sum of its proper divisors (20699045).

66431035 is a wasteful number, since it uses less digits than its factorization.

66431035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 66431035 is about 8150.5236028123. The cubic root of 66431035 is about 405.0018493031.

Subtracting from 66431035 its reverse (53013466), we obtain a square (13417569 = 3663²).

The spelling of 66431035 in words is "sixty-six million, four hundred thirty-one thousand, thirty-five".