749666305 has 4 divisors (see below), whose sum is σ = 899599572. Its totient is φ = 599733040.

The previous prime is 749666303. The next prime is 749666317. The reversal of 749666305 is 503666947.

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 429649984 + 320016321 = 20728^2 + 17889^2 .

It is not a de Polignac number, because 749666305 - 2¹ = 749666303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749666303) 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, 74966626 + ... + 74966635.

It is an arithmetic number, because the mean of its divisors is an integer number (224899893).

It is a Proth number, since it is equal to 11439 ⋅ 2¹⁶ + 1 and 11439 < 2¹⁶.

Almost surely, 2^749666305 is an apocalyptic number.

It is an amenable number.

749666305 is a deficient number, since it is larger than the sum of its proper divisors (149933267).

749666305 is a wasteful number, since it uses less digits than its factorization.

749666305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149933266.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 749666305 is about 27380.0347881444. The cubic root of 749666305 is about 908.4255288588.

The spelling of 749666305 in words is "seven hundred forty-nine million, six hundred sixty-six thousand, three hundred five".