245353849666 has 4 divisors (see below), whose sum is σ = 368030774502. Its totient is φ = 122676924832.

The previous prime is 245353849661. The next prime is 245353849669. The reversal of 245353849666 is 666948353542.

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

It can be written as a sum of positive squares in only one way, i.e., 209698969041 + 35654880625 = 457929^2 + 188825^2 .

It is a super-2 number, since 2×245353849666² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245353849661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61338462415 + ... + 61338462418.

Almost surely, 2^245353849666 is an apocalyptic number.

245353849666 is a deficient number, since it is larger than the sum of its proper divisors (122676924836).

245353849666 is a wasteful number, since it uses less digits than its factorization.

245353849666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122676924835.

The product of its digits is 111974400, while the sum is 61.

The spelling of 245353849666 in words is "two hundred forty-five billion, three hundred fifty-three million, eight hundred forty-nine thousand, six hundred sixty-six".