740281661 has 12 divisors (see below), whose sum is σ = 862086240. Its totient is φ = 633832920.

The previous prime is 740281639. The next prime is 740281709. The reversal of 740281661 is 166182047.

It is not a de Polignac number, because 740281661 - 2¹⁸ = 740019517 is a prime.

It is a super-2 number, since 2×740281661² = 1096033875225837842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740281261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39800 + ... + 55358.

It is an arithmetic number, because the mean of its divisors is an integer number (71840520).

Almost surely, 2^740281661 is an apocalyptic number.

It is an amenable number.

740281661 is a deficient number, since it is larger than the sum of its proper divisors (121804579).

740281661 is a wasteful number, since it uses less digits than its factorization.

740281661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544 (or 16537 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 740281661 is about 27208.1175570821. The cubic root of 740281661 is about 904.6189134496.

The spelling of 740281661 in words is "seven hundred forty million, two hundred eighty-one thousand, six hundred sixty-one".