66632637 has 4 divisors (see below), whose sum is σ = 88843520. Its totient is φ = 44421756.

The previous prime is 66632611. The next prime is 66632659. The reversal of 66632637 is 73623666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66632637 - 2⁷ = 66632509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66632595 and 66632604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66632437) 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, 11105437 + ... + 11105442.

It is an arithmetic number, because the mean of its divisors is an integer number (22210880).

Almost surely, 2^66632637 is an apocalyptic number.

It is an amenable number.

66632637 is a deficient number, since it is larger than the sum of its proper divisors (22210883).

66632637 is a wasteful number, since it uses less digits than its factorization.

66632637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22210882.

The product of its digits is 163296, while the sum is 39.

The square root of 66632637 is about 8162.8816602962. The cubic root of 66632637 is about 405.4111295272.

The spelling of 66632637 in words is "sixty-six million, six hundred thirty-two thousand, six hundred thirty-seven".