65400956 has 12 divisors (see below), whose sum is σ = 114574992. Its totient is φ = 32665248.

The previous prime is 65400953. The next prime is 65400977. The reversal of 65400956 is 65900456.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65400953) 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, 4385 + ... + 12248.

It is an arithmetic number, because the mean of its divisors is an integer number (9547916).

Almost surely, 2^65400956 is an apocalyptic number.

It is an amenable number.

65400956 is a deficient number, since it is larger than the sum of its proper divisors (49174036).

65400956 is a wasteful number, since it uses less digits than its factorization.

65400956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17620 (or 17618 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 65400956 is about 8087.0857544606. The cubic root of 65400956 is about 402.8976171847.

Subtracting 65400956 from its reverse (65900456), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 65400956 in words is "sixty-five million, four hundred thousand, nine hundred fifty-six".