7435540661 has 4 divisors (see below), whose sum is σ = 7450323552. Its totient is φ = 7420757772.

The previous prime is 7435540613. The next prime is 7435540663. The reversal of 7435540661 is 1660455347.

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: 1660455347 = 19507 ⋅85121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7435540661 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 (7435540663) 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, 7390691 + ... + 7391696.

It is an arithmetic number, because the mean of its divisors is an integer number (1862580888).

Almost surely, 2^7435540661 is an apocalyptic number.

It is an amenable number.

7435540661 is a deficient number, since it is larger than the sum of its proper divisors (14782891).

7435540661 is a wasteful number, since it uses less digits than its factorization.

7435540661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14782890.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 7435540661 is about 86229.5811250408. The cubic root of 7435540661 is about 1951.8099050534.

The spelling of 7435540661 in words is "seven billion, four hundred thirty-five million, five hundred forty thousand, six hundred sixty-one".