736366661 has 4 divisors (see below), whose sum is σ = 736672992. Its totient is φ = 736060332.

The previous prime is 736366639. The next prime is 736366703. The reversal of 736366661 is 166663637.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166663637 = 7 ⋅23809091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-736366661 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 (736369661) 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, 149531 + ... + 154376.

It is an arithmetic number, because the mean of its divisors is an integer number (184168248).

Almost surely, 2^736366661 is an apocalyptic number.

It is an amenable number.

736366661 is a deficient number, since it is larger than the sum of its proper divisors (306331).

736366661 is a wasteful number, since it uses less digits than its factorization.

736366661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306330.

The product of its digits is 489888, while the sum is 44.

The square root of 736366661 is about 27136.0767429634. The cubic root of 736366661 is about 903.0213932559.

The spelling of 736366661 in words is "seven hundred thirty-six million, three hundred sixty-six thousand, six hundred sixty-one".