66447402 has 16 divisors (see below), whose sum is σ = 151879872. Its totient is φ = 18984960.

The previous prime is 66447383. The next prime is 66447413. The reversal of 66447402 is 20474466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790999 + ... + 791082.

It is an arithmetic number, because the mean of its divisors is an integer number (9492492).

Almost surely, 2^66447402 is an apocalyptic number.

66447402 is an abundant number, since it is smaller than the sum of its proper divisors (85432470).

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

66447402 is a wasteful number, since it uses less digits than its factorization.

66447402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582093.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 66447402 is about 8151.5275869005. The cubic root of 66447402 is about 405.0351074581.

The spelling of 66447402 in words is "sixty-six million, four hundred forty-seven thousand, four hundred two".