64066997 has 4 divisors (see below), whose sum is σ = 64322496. Its totient is φ = 63811500.

The previous prime is 64066967. The next prime is 64067009. The reversal of 64066997 is 79966046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64066997 - 2⁸ = 64066741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64066967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127373 + ... + 127874.

It is an arithmetic number, because the mean of its divisors is an integer number (16080624).

Almost surely, 2^64066997 is an apocalyptic number.

It is an amenable number.

64066997 is a deficient number, since it is larger than the sum of its proper divisors (255499).

64066997 is a wasteful number, since it uses less digits than its factorization.

64066997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255498.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 64066997 is about 8004.1862172241. The cubic root of 64066997 is about 400.1395284072.

The spelling of 64066997 in words is "sixty-four million, sixty-six thousand, nine hundred ninety-seven".