66000402 has 24 divisors (see below), whose sum is σ = 154001484. Its totient is φ = 20307744.

The previous prime is 66000373. The next prime is 66000419. The reversal of 66000402 is 20400066.

66000402 is a `hidden beast` number, since 660 + 0 + 0 + 4 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62394201 + 3606201 = 7899^2 + 1899^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140793 + ... + 141260.

Almost surely, 2^66000402 is an apocalyptic number.

66000402 is an abundant number, since it is smaller than the sum of its proper divisors (88001082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66000402 is a wasteful number, since it uses less digits than its factorization.

66000402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282074 (or 282071 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 66000402 is about 8124.0631459880. The cubic root of 66000402 is about 404.1248225547.

Adding to 66000402 its reverse (20400066), we get a palindrome (86400468).

The spelling of 66000402 in words is "sixty-six million, four hundred two", and thus it is an aban number.