66402046 has 16 divisors (see below), whose sum is σ = 101043648. Its totient is φ = 32724000.

The previous prime is 66402043. The next prime is 66402053. The reversal of 66402046 is 64020466.

It is a super-2 number, since 2×66402046² = 8818463425972232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66402043) 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 7 ways as a sum of consecutive naturals, for example, 54136 + ... + 55348.

It is an arithmetic number, because the mean of its divisors is an integer number (6315228).

Almost surely, 2^66402046 is an apocalyptic number.

66402046 is a deficient number, since it is larger than the sum of its proper divisors (34641602).

66402046 is a wasteful number, since it uses less digits than its factorization.

66402046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 66402046 is about 8148.7450567557. The cubic root of 66402046 is about 404.9429295186.

The spelling of 66402046 in words is "sixty-six million, four hundred two thousand, forty-six".