66452631 has 16 divisors (see below), whose sum is σ = 101781504. Its totient is φ = 37777824.

The previous prime is 66452627. The next prime is 66452669. The reversal of 66452631 is 13625466.

It is not a de Polignac number, because 66452631 - 2² = 66452627 is a prime.

It is a super-2 number, since 2×66452631² = 8831904333644322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66452592 and 66452601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66452621) 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 15 ways as a sum of consecutive naturals, for example, 3895 + ... + 12168.

It is an arithmetic number, because the mean of its divisors is an integer number (6361344).

Almost surely, 2^66452631 is an apocalyptic number.

66452631 is a deficient number, since it is larger than the sum of its proper divisors (35328873).

66452631 is a wasteful number, since it uses less digits than its factorization.

66452631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16270.

The product of its digits is 25920, while the sum is 33.

The square root of 66452631 is about 8151.8483180197. The cubic root of 66452631 is about 405.0457317662.

The spelling of 66452631 in words is "sixty-six million, four hundred fifty-two thousand, six hundred thirty-one".