748455661 has 4 divisors (see below), whose sum is σ = 772599424. Its totient is φ = 724311900.

The previous prime is 748455629. The next prime is 748455671. The reversal of 748455661 is 166554847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 748455661 - 2⁵ = 748455629 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 (748455601) 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, 12071835 + ... + 12071896.

It is an arithmetic number, because the mean of its divisors is an integer number (193149856).

Almost surely, 2^748455661 is an apocalyptic number.

It is an amenable number.

748455661 is a deficient number, since it is larger than the sum of its proper divisors (24143763).

748455661 is a wasteful number, since it uses less digits than its factorization.

748455661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24143762.

The product of its digits is 806400, while the sum is 46.

The square root of 748455661 is about 27357.9177021936. The cubic root of 748455661 is about 907.9362567406.

The spelling of 748455661 in words is "seven hundred forty-eight million, four hundred fifty-five thousand, six hundred sixty-one".