53401666 has 16 divisors (see below), whose sum is σ = 84864960. Its totient is φ = 25131600.

The previous prime is 53401637. The next prime is 53401669. The reversal of 53401666 is 66610435.

It is not an unprimeable number, because it can be changed into a prime (53401669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (5304060).

Almost surely, 2^53401666 is an apocalyptic number.

53401666 is a deficient number, since it is larger than the sum of its proper divisors (31463294).

53401666 is a wasteful number, since it uses less digits than its factorization.

53401666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9129.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 53401666 is about 7307.6443536888. The cubic root of 53401666 is about 376.5751016977.

The spelling of 53401666 in words is "fifty-three million, four hundred one thousand, six hundred sixty-six".