742746661 has 4 divisors (see below), whose sum is σ = 743902432. Its totient is φ = 741590892.

The previous prime is 742746649. The next prime is 742746671. The reversal of 742746661 is 166647247.

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 a cyclic number.

It is not a de Polignac number, because 742746661 - 2²⁵ = 709192229 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 (742746671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576921 + ... + 578206.

It is an arithmetic number, because the mean of its divisors is an integer number (185975608).

Almost surely, 2^742746661 is an apocalyptic number.

It is an amenable number.

742746661 is a deficient number, since it is larger than the sum of its proper divisors (1155771).

742746661 is a wasteful number, since it uses less digits than its factorization.

742746661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155770.

The product of its digits is 338688, while the sum is 43.

The square root of 742746661 is about 27253.3788914329. The cubic root of 742746661 is about 905.6218718607.

The spelling of 742746661 in words is "seven hundred forty-two million, seven hundred forty-six thousand, six hundred sixty-one".