736665401 has 2 divisors, whose sum is σ = 736665402. Its totient is φ = 736665400.

The previous prime is 736665323. The next prime is 736665407. The reversal of 736665401 is 104566637.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380211001 + 356454400 = 19499^2 + 18880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-736665401 is a prime.

It is not a weakly prime, because it can be changed into another prime (736665407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 368332700 + 368332701.

It is an arithmetic number, because the mean of its divisors is an integer number (368332701).

Almost surely, 2^736665401 is an apocalyptic number.

It is an amenable number.

736665401 is a deficient number, since it is larger than the sum of its proper divisors (1).

736665401 is an equidigital number, since it uses as much as digits as its factorization.

736665401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 736665401 is about 27141.5806650976. The cubic root of 736665401 is about 903.1434937222.

The spelling of 736665401 in words is "seven hundred thirty-six million, six hundred sixty-five thousand, four hundred one".