661462531 has 8 divisors (see below), whose sum is σ = 686344064. Its totient is φ = 636802560.

The previous prime is 661462517. The next prime is 661462541. The reversal of 661462531 is 135264166.

661462531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 661462531 - 2⁹ = 661462019 is a prime.

It is a super-2 number, since 2×661462531² = 875065359833851922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661462541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49296 + ... + 61261.

It is an arithmetic number, because the mean of its divisors is an integer number (85793008).

Almost surely, 2^661462531 is an apocalyptic number.

661462531 is a deficient number, since it is larger than the sum of its proper divisors (24881533).

661462531 is a wasteful number, since it uses less digits than its factorization.

661462531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110781.

The product of its digits is 25920, while the sum is 34.

The square root of 661462531 is about 25718.9138767561. The cubic root of 661462531 is about 871.3014085227.

The spelling of 661462531 in words is "six hundred sixty-one million, four hundred sixty-two thousand, five hundred thirty-one".