64149966 has 24 divisors (see below), whose sum is σ = 146307720. Its totient is φ = 20257776.

The previous prime is 64149949. The next prime is 64149983. The reversal of 64149966 is 66994146.

It is an interprime number because it is at equal distance from previous prime (64149949) and next prime (64149983).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93445 + ... + 94128.

It is an arithmetic number, because the mean of its divisors is an integer number (6096155).

Almost surely, 2^64149966 is an apocalyptic number.

64149966 is an abundant number, since it is smaller than the sum of its proper divisors (82157754).

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

64149966 is a wasteful number, since it uses less digits than its factorization.

64149966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187600 (or 187597 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 64149966 is about 8009.3673907494. The cubic root of 64149966 is about 400.3121854539.

The spelling of 64149966 in words is "sixty-four million, one hundred forty-nine thousand, nine hundred sixty-six".