66941386 has 16 divisors (see below), whose sum is σ = 101851488. Its totient is φ = 32994000.

The previous prime is 66941383. The next prime is 66941387. The reversal of 66941386 is 68314966.

It is a super-2 number, since 2×66941386² = 8962298319201992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66941383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56581 + ... + 57751.

It is an arithmetic number, because the mean of its divisors is an integer number (6365718).

Almost surely, 2^66941386 is an apocalyptic number.

66941386 is a deficient number, since it is larger than the sum of its proper divisors (34910102).

66941386 is a wasteful number, since it uses less digits than its factorization.

66941386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557.

The product of its digits is 186624, while the sum is 43.

The square root of 66941386 is about 8181.7715685541. The cubic root of 66941386 is about 406.0363358972.

The spelling of 66941386 in words is "sixty-six million, nine hundred forty-one thousand, three hundred eighty-six".