64147866 has 32 divisors (see below), whose sum is σ = 132945408. Its totient is φ = 20613120.

The previous prime is 64147859. The next prime is 64147871. The reversal of 64147866 is 66874146.

It is a super-2 number, since 2×64147866² = 8229897424707912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65170 + ... + 66146.

It is an arithmetic number, because the mean of its divisors is an integer number (4154544).

Almost surely, 2^64147866 is an apocalyptic number.

64147866 is an abundant number, since it is smaller than the sum of its proper divisors (68797542).

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

64147866 is a wasteful number, since it uses less digits than its factorization.

64147866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366.

The product of its digits is 193536, while the sum is 42.

The square root of 64147866 is about 8009.2362931805. The cubic root of 64147866 is about 400.3078172273.

The spelling of 64147866 in words is "sixty-four million, one hundred forty-seven thousand, eight hundred sixty-six".