6614923921 has 4 divisors (see below), whose sum is σ = 6651470644. Its totient is φ = 6578377200.

The previous prime is 6614923859. The next prime is 6614923927. The reversal of 6614923921 is 1293294166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3267722896 + 3347201025 = 57164^2 + 57855^2 .

It is a cyclic number.

It is not a de Polignac number, because 6614923921 - 2⁷ = 6614923793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6614923927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18273090 + ... + 18273451.

It is an arithmetic number, because the mean of its divisors is an integer number (1662867661).

Almost surely, 2^6614923921 is an apocalyptic number.

It is an amenable number.

6614923921 is a deficient number, since it is larger than the sum of its proper divisors (36546723).

6614923921 is a wasteful number, since it uses less digits than its factorization.

6614923921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36546722.

The product of its digits is 139968, while the sum is 43.

The square root of 6614923921 is about 81332.1825663126. The cubic root of 6614923921 is about 1877.1902271369.

The spelling of 6614923921 in words is "six billion, six hundred fourteen million, nine hundred twenty-three thousand, nine hundred twenty-one".