5621666434 has 16 divisors (see below), whose sum is σ = 8597534400. Its totient is φ = 2755894960.

The previous prime is 5621666431. The next prime is 5621666441. The reversal of 5621666434 is 4346661265.

It is not an unprimeable number, because it can be changed into a prime (5621666431) 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, 142617 + ... + 177715.

It is an arithmetic number, because the mean of its divisors is an integer number (537345900).

Almost surely, 2^5621666434 is an apocalyptic number.

5621666434 is a deficient number, since it is larger than the sum of its proper divisors (2975867966).

5621666434 is a wasteful number, since it uses less digits than its factorization.

5621666434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36665.

The product of its digits is 622080, while the sum is 43.

The square root of 5621666434 is about 74977.7729330500. The cubic root of 5621666434 is about 1778.0952601955.

The spelling of 5621666434 in words is "five billion, six hundred twenty-one million, six hundred sixty-six thousand, four hundred thirty-four".