2664154421 has 2 divisors, whose sum is σ = 2664154422. Its totient is φ = 2664154420.

The previous prime is 2664154399. The next prime is 2664154447. The reversal of 2664154421 is 1244514662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2622873796 + 41280625 = 51214^2 + 6425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2664154421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664153421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332077210 + 1332077211.

It is an arithmetic number, because the mean of its divisors is an integer number (1332077211).

Almost surely, 2^2664154421 is an apocalyptic number.

It is an amenable number.

2664154421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664154421 is an equidigital number, since it uses as much as digits as its factorization.

2664154421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 35.

The square root of 2664154421 is about 51615.4475036302. The cubic root of 2664154421 is about 1386.2869384134.

The spelling of 2664154421 in words is "two billion, six hundred sixty-four million, one hundred fifty-four thousand, four hundred twenty-one".