66361438 has 32 divisors (see below), whose sum is σ = 123832800. Its totient is φ = 26204160.

The previous prime is 66361403. The next prime is 66361441. The reversal of 66361438 is 83416366.

It is a junction number, because it is equal to n+sod(n) for n = 66361397 and 66361406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963 + ... + 11686.

It is an arithmetic number, because the mean of its divisors is an integer number (3869775).

Almost surely, 2^66361438 is an apocalyptic number.

66361438 is a deficient number, since it is larger than the sum of its proper divisors (57471362).

66361438 is a wasteful number, since it uses less digits than its factorization.

66361438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13692.

The product of its digits is 62208, while the sum is 37.

The square root of 66361438 is about 8146.2530036821. The cubic root of 66361438 is about 404.8603654176.

The spelling of 66361438 in words is "sixty-six million, three hundred sixty-one thousand, four hundred thirty-eight".