742666247 has 4 divisors (see below), whose sum is σ = 742740216. Its totient is φ = 742592280.

The previous prime is 742666237. The next prime is 742666271.

742666247 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 742666247 - 2¹⁰ = 742665223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 742666198 and 742666207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742666237) 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, 19013 + ... + 42974.

It is an arithmetic number, because the mean of its divisors is an integer number (185685054).

Almost surely, 2^742666247 is an apocalyptic number.

742666247 is a deficient number, since it is larger than the sum of its proper divisors (73969).

742666247 is a wasteful number, since it uses less digits than its factorization.

742666247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73968.

The product of its digits is 677376, while the sum is 44.

The square root of 742666247 is about 27251.9035481927. The cubic root of 742666247 is about 905.5891880807.

The spelling of 742666247 in words is "seven hundred forty-two million, six hundred sixty-six thousand, two hundred forty-seven".