65651397 has 16 divisors (see below), whose sum is σ = 103268352. Its totient is φ = 36304560.

The previous prime is 65651393. The next prime is 65651401. The reversal of 65651397 is 79315656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65651393) and next prime (65651401).

It is not a de Polignac number, because 65651397 - 2² = 65651393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65651393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49773 + ... + 51074.

It is an arithmetic number, because the mean of its divisors is an integer number (6454272).

Almost surely, 2^65651397 is an apocalyptic number.

It is an amenable number.

65651397 is a deficient number, since it is larger than the sum of its proper divisors (37616955).

65651397 is a wasteful number, since it uses less digits than its factorization.

65651397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100888.

The product of its digits is 170100, while the sum is 42.

The square root of 65651397 is about 8102.5549674161. The cubic root of 65651397 is about 403.4112363846.

The spelling of 65651397 in words is "sixty-five million, six hundred fifty-one thousand, three hundred ninety-seven".