66402027 has 12 divisors (see below), whose sum is σ = 96085080. Its totient is φ = 44189088.

The previous prime is 66401957. The next prime is 66402043. The reversal of 66402027 is 72020466.

It is not a de Polignac number, because 66402027 - 2¹⁰ = 66401003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66402067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002 + ... + 11567.

It is an arithmetic number, because the mean of its divisors is an integer number (8007090).

Almost surely, 2^66402027 is an apocalyptic number.

66402027 is a deficient number, since it is larger than the sum of its proper divisors (29683053).

66402027 is a wasteful number, since it uses less digits than its factorization.

66402027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162 (or 13159 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 66402027 is about 8148.7438909319. The cubic root of 66402027 is about 404.9428908957.

The spelling of 66402027 in words is "sixty-six million, four hundred two thousand, twenty-seven".