654659961 has 8 divisors (see below), whose sum is σ = 873118464. Its totient is φ = 436320720.

The previous prime is 654659939. The next prime is 654659983. The reversal of 654659961 is 169956456.

It is an interprime number because it is at equal distance from previous prime (654659939) and next prime (654659983).

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

It is not a de Polignac number, because 654659961 - 2⁶ = 654659897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654659911) 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, 16105 + ... + 39606.

It is an arithmetic number, because the mean of its divisors is an integer number (109139808).

Almost surely, 2^654659961 is an apocalyptic number.

It is an amenable number.

654659961 is a deficient number, since it is larger than the sum of its proper divisors (218458503).

654659961 is a wasteful number, since it uses less digits than its factorization.

654659961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59631.

The product of its digits is 1749600, while the sum is 51.

The square root of 654659961 is about 25586.3237101386. The cubic root of 654659961 is about 868.3042500745.

The spelling of 654659961 in words is "six hundred fifty-four million, six hundred fifty-nine thousand, nine hundred sixty-one".