65156980 has 24 divisors (see below), whose sum is σ = 156377088. Its totient is φ = 22339488.

The previous prime is 65156977. The next prime is 65156983. The reversal of 65156980 is 8965156.

It is an interprime number because it is at equal distance from previous prime (65156977) and next prime (65156983).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65156983) 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, 232564 + ... + 232843.

It is an arithmetic number, because the mean of its divisors is an integer number (6515712).

Almost surely, 2^65156980 is an apocalyptic number.

It is an amenable number.

65156980 is an abundant number, since it is smaller than the sum of its proper divisors (91220108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65156980 is a wasteful number, since it uses less digits than its factorization.

65156980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465423 (or 465421 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 65156980 is about 8071.9873637166. The cubic root of 65156980 is about 402.3959943714.

The spelling of 65156980 in words is "sixty-five million, one hundred fifty-six thousand, nine hundred eighty".