1465356661 has 4 divisors (see below), whose sum is σ = 1465754400. Its totient is φ = 1464958924.

The previous prime is 1465356643. The next prime is 1465356671. The reversal of 1465356661 is 1666535641.

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: 1666535641 = 35831 ⋅46511.

It is a cyclic number.

It is not a de Polignac number, because 1465356661 - 2⁷ = 1465356533 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 (1465356671) 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, 193291 + ... + 200728.

It is an arithmetic number, because the mean of its divisors is an integer number (366438600).

Almost surely, 2^1465356661 is an apocalyptic number.

It is an amenable number.

1465356661 is a deficient number, since it is larger than the sum of its proper divisors (397739).

1465356661 is an equidigital number, since it uses as much as digits as its factorization.

1465356661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397738.

The product of its digits is 388800, while the sum is 43.

The square root of 1465356661 is about 38279.9772857822. The cubic root of 1465356661 is about 1135.8329091697.

The spelling of 1465356661 in words is "one billion, four hundred sixty-five million, three hundred fifty-six thousand, six hundred sixty-one".