2657660149 has 2 divisors, whose sum is σ = 2657660150. Its totient is φ = 2657660148.

The previous prime is 2657660009. The next prime is 2657660153. The reversal of 2657660149 is 9410667562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2252926225 + 404733924 = 47465^2 + 20118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2657660149 - 2²⁵ = 2624105717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2657660099 and 2657660108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2657660179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328830074 + 1328830075.

It is an arithmetic number, because the mean of its divisors is an integer number (1328830075).

Almost surely, 2^2657660149 is an apocalyptic number.

It is an amenable number.

2657660149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2657660149 is an equidigital number, since it uses as much as digits as its factorization.

2657660149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 2657660149 is about 51552.4989597983. The cubic root of 2657660149 is about 1385.1595951406.

The spelling of 2657660149 in words is "two billion, six hundred fifty-seven million, six hundred sixty thousand, one hundred forty-nine".