253666377 has 8 divisors (see below), whose sum is σ = 375802080. Its totient is φ = 169110900.

The previous prime is 253666337. The next prime is 253666403. The reversal of 253666377 is 773666352.

253666377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 253666377 - 2¹⁴ = 253649993 is a prime.

It is a super-2 number, since 2×253666377² = 128693261640612258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253666307) 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, 4697499 + ... + 4697552.

It is an arithmetic number, because the mean of its divisors is an integer number (46975260).

Almost surely, 2^253666377 is an apocalyptic number.

253666377 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

253666377 is a deficient number, since it is larger than the sum of its proper divisors (122135703).

253666377 is an equidigital number, since it uses as much as digits as its factorization.

253666377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9395060 (or 9395054 counting only the distinct ones).

The product of its digits is 952560, while the sum is 45.

The square root of 253666377 is about 15926.9073269106. The cubic root of 253666377 is about 633.0251556679.

The spelling of 253666377 in words is "two hundred fifty-three million, six hundred sixty-six thousand, three hundred seventy-seven".