65978156 has 12 divisors (see below), whose sum is σ = 122253768. Its totient is φ = 31048512.

The previous prime is 65978131. The next prime is 65978167. The reversal of 65978156 is 65187956.

It is a self number, because there is not a number n which added to its sum of digits gives 65978156.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485066 + ... + 485201.

It is an arithmetic number, because the mean of its divisors is an integer number (10187814).

Almost surely, 2^65978156 is an apocalyptic number.

It is an amenable number.

65978156 is a deficient number, since it is larger than the sum of its proper divisors (56275612).

65978156 is a wasteful number, since it uses less digits than its factorization.

65978156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970288 (or 970286 counting only the distinct ones).

The product of its digits is 453600, while the sum is 47.

The square root of 65978156 is about 8122.6938881137. The cubic root of 65978156 is about 404.0794128765.

The spelling of 65978156 in words is "sixty-five million, nine hundred seventy-eight thousand, one hundred fifty-six".