66436442 has 32 divisors (see below), whose sum is σ = 108635904. Its totient is φ = 30355200.

The previous prime is 66436439. The next prime is 66436451. The reversal of 66436442 is 24463466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213467 + ... + 213777.

It is an arithmetic number, because the mean of its divisors is an integer number (3394872).

Almost surely, 2^66436442 is an apocalyptic number.

66436442 is a deficient number, since it is larger than the sum of its proper divisors (42199462).

66436442 is a wasteful number, since it uses less digits than its factorization.

66436442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494.

The product of its digits is 82944, while the sum is 35.

The square root of 66436442 is about 8150.8552925445. The cubic root of 66436442 is about 405.0128370671.

The spelling of 66436442 in words is "sixty-six million, four hundred thirty-six thousand, four hundred forty-two".