66952031 has 4 divisors (see below), whose sum is σ = 67035600. Its totient is φ = 66868464.

The previous prime is 66952021. The next prime is 66952117. The reversal of 66952031 is 13025966.

It is a happy number.

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-66952031 is a prime.

It is a super-2 number, since 2×66952031² = 8965148910049922, 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 (66952021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40571 + ... + 42188.

It is an arithmetic number, because the mean of its divisors is an integer number (16758900).

Almost surely, 2^66952031 is an apocalyptic number.

66952031 is a deficient number, since it is larger than the sum of its proper divisors (83569).

66952031 is an equidigital number, since it uses as much as digits as its factorization.

66952031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83568.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 66952031 is about 8182.4220741783. The cubic root of 66952031 is about 406.0578573503.

Adding to 66952031 its reverse (13025966), we get a palindrome (79977997).

The spelling of 66952031 in words is "sixty-six million, nine hundred fifty-two thousand, thirty-one".