64066637 has 4 divisors (see below), whose sum is σ = 64969056. Its totient is φ = 63164220.

The previous prime is 64066633. The next prime is 64066649. The reversal of 64066637 is 73666046.

64066637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73666046 = 2 ⋅36833023.

It is a cyclic number.

It is not a de Polignac number, because 64066637 - 2² = 64066633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64066637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64066631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451103 + ... + 451244.

It is an arithmetic number, because the mean of its divisors is an integer number (16242264).

Almost surely, 2^64066637 is an apocalyptic number.

It is an amenable number.

64066637 is a deficient number, since it is larger than the sum of its proper divisors (902419).

64066637 is an equidigital number, since it uses as much as digits as its factorization.

64066637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902418.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 64066637 is about 8004.1637289601. The cubic root of 64066637 is about 400.1387789288.

The spelling of 64066637 in words is "sixty-four million, sixty-six thousand, six hundred thirty-seven".