65661463 has 16 divisors (see below), whose sum is σ = 79743744. Its totient is φ = 52778880.

The previous prime is 65661461. The next prime is 65661487. The reversal of 65661463 is 36416656.

It is not a de Polignac number, because 65661463 - 2¹ = 65661461 is a prime.

It is a super-2 number, since 2×65661463² = 8622855446600738, 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 (65661461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38556 + ... + 40222.

It is an arithmetic number, because the mean of its divisors is an integer number (4983984).

Almost surely, 2^65661463 is an apocalyptic number.

65661463 is a deficient number, since it is larger than the sum of its proper divisors (14082281).

65661463 is a wasteful number, since it uses less digits than its factorization.

65661463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022.

The product of its digits is 77760, while the sum is 37.

The square root of 65661463 is about 8103.1761057008. The cubic root of 65661463 is about 403.4318530060.

The spelling of 65661463 in words is "sixty-five million, six hundred sixty-one thousand, four hundred sixty-three".