740577661 has 2 divisors, whose sum is σ = 740577662. Its totient is φ = 740577660.

The previous prime is 740577601. The next prime is 740577701. The reversal of 740577661 is 166775047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504002500 + 236575161 = 22450^2 + 15381^2 .

It is a cyclic number.

It is not a de Polignac number, because 740577661 - 2¹¹ = 740575613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (740577601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370288830 + 370288831.

It is an arithmetic number, because the mean of its divisors is an integer number (370288831).

Almost surely, 2^740577661 is an apocalyptic number.

It is an amenable number.

740577661 is a deficient number, since it is larger than the sum of its proper divisors (1).

740577661 is an equidigital number, since it uses as much as digits as its factorization.

740577661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 740577661 is about 27213.5565665350. The cubic root of 740577661 is about 904.7394673467.

It can be divided in two parts, 74057 and 7661, that added together give a palindrome (81718).

The spelling of 740577661 in words is "seven hundred forty million, five hundred seventy-seven thousand, six hundred sixty-one".