748458661 has 4 divisors (see below), whose sum is σ = 748521324. Its totient is φ = 748396000.

The previous prime is 748458647. The next prime is 748458671. The reversal of 748458661 is 166854847.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 166854847 = 17 ⋅9814991.

It can be written as a sum of positive squares in 2 ways, for example, as 35034561 + 713424100 = 5919^2 + 26710^2 .

It is a cyclic number.

It is not a de Polignac number, because 748458661 - 2⁵ = 748458629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748458611) 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, 7240 + ... + 39361.

It is an arithmetic number, because the mean of its divisors is an integer number (187130331).

Almost surely, 2^748458661 is an apocalyptic number.

It is an amenable number.

748458661 is a deficient number, since it is larger than the sum of its proper divisors (62663).

748458661 is a wasteful number, since it uses less digits than its factorization.

748458661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62662.

The product of its digits is 1290240, while the sum is 49.

The square root of 748458661 is about 27357.9725308730. The cubic root of 748458661 is about 907.9374698185.

The spelling of 748458661 in words is "seven hundred forty-eight million, four hundred fifty-eight thousand, six hundred sixty-one".