65378980 has 24 divisors (see below), whose sum is σ = 137592000. Its totient is φ = 26095200.

The previous prime is 65378977. The next prime is 65378987. The reversal of 65378980 is 8987356.

It is a super-2 number, since 2×65378980² = 8548822051680800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65378980.

It is not an unprimeable number, because it can be changed into a prime (65378987) 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, 6705 + ... + 13255.

It is an arithmetic number, because the mean of its divisors is an integer number (5733000).

Almost surely, 2^65378980 is an apocalyptic number.

It is an amenable number.

65378980 is an abundant number, since it is smaller than the sum of its proper divisors (72213020).

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

65378980 is a wasteful number, since it uses less digits than its factorization.

65378980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059 (or 7057 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 65378980 is about 8085.7269308331. The cubic root of 65378980 is about 402.8524849701.

The spelling of 65378980 in words is "sixty-five million, three hundred seventy-eight thousand, nine hundred eighty".