736706666 has 4 divisors (see below), whose sum is σ = 1105060002. Its totient is φ = 368353332.

The previous prime is 736706657. The next prime is 736706671. The reversal of 736706666 is 666607637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666607637 = 4657 ⋅143141.

It can be written as a sum of positive squares in only one way, i.e., 421111441 + 315595225 = 20521^2 + 17765^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 736706666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184176665 + ... + 184176668.

Almost surely, 2^736706666 is an apocalyptic number.

736706666 is a deficient number, since it is larger than the sum of its proper divisors (368353336).

736706666 is a wasteful number, since it uses less digits than its factorization.

736706666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368353335.

The product of its (nonzero) digits is 1143072, while the sum is 47.

The square root of 736706666 is about 27142.3408349391. The cubic root of 736706666 is about 903.1603568826.

The spelling of 736706666 in words is "seven hundred thirty-six million, seven hundred six thousand, six hundred sixty-six".