65409970 has 16 divisors (see below), whose sum is σ = 123935040. Its totient is φ = 24786864.

The previous prime is 65409959. The next prime is 65409973. The reversal of 65409970 is 7990456.

It is not an unprimeable number, because it can be changed into a prime (65409973) 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, 171942 + ... + 172321.

It is an arithmetic number, because the mean of its divisors is an integer number (7745940).

Almost surely, 2^65409970 is an apocalyptic number.

65409970 is a deficient number, since it is larger than the sum of its proper divisors (58525070).

65409970 is a wasteful number, since it uses less digits than its factorization.

65409970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344289.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 65409970 is about 8087.6430435573. The cubic root of 65409970 is about 402.9161263549.

The spelling of 65409970 in words is "sixty-five million, four hundred nine thousand, nine hundred seventy".