66354402 has 32 divisors (see below), whose sum is σ = 139934592. Its totient is φ = 20934144.

The previous prime is 66354377. The next prime is 66354413. The reversal of 66354402 is 20445366.

It is a self number, because there is not a number n which added to its sum of digits gives 66354402.

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, 10908 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (4372956).

Almost surely, 2^66354402 is an apocalyptic number.

66354402 is an abundant number, since it is smaller than the sum of its proper divisors (73580190).

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

66354402 is a wasteful number, since it uses less digits than its factorization.

66354402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66354402 is about 8145.8211372458. The cubic root of 66354402 is about 404.8460564138.

Adding to 66354402 its reverse (20445366), we get a palindrome (86799768).

The spelling of 66354402 in words is "sixty-six million, three hundred fifty-four thousand, four hundred two".