66432402 has 12 divisors (see below), whose sum is σ = 143936910. Its totient is φ = 22144128.

The previous prime is 66432397. The next prime is 66432437. The reversal of 66432402 is 20423466.

It can be written as a sum of positive squares in only one way, i.e., 62110161 + 4322241 = 7881^2 + 2079^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1845327 + ... + 1845362.

Almost surely, 2^66432402 is an apocalyptic number.

66432402 is an abundant number, since it is smaller than the sum of its proper divisors (77504508).

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

66432402 is a wasteful number, since it uses less digits than its factorization.

66432402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690697 (or 3690694 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 66432402 is about 8150.6074620239. The cubic root of 66432402 is about 405.0046272905.

Adding to 66432402 its reverse (20423466), we get a palindrome (86855868).

It can be divided in two parts, 6643 and 2402, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 66432402 in words is "sixty-six million, four hundred thirty-two thousand, four hundred two".