67723664 has 20 divisors (see below), whose sum is σ = 133367580. Its totient is φ = 33306240.

The previous prime is 67723609. The next prime is 67723693. The reversal of 67723664 is 46632776.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 48888064 = 4340^2 + 6992^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33719 + ... + 35670.

It is an arithmetic number, because the mean of its divisors is an integer number (6668379).

Almost surely, 2^67723664 is an apocalyptic number.

It is an amenable number.

67723664 is a deficient number, since it is larger than the sum of its proper divisors (65643916).

67723664 is a wasteful number, since it uses less digits than its factorization.

67723664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69458 (or 69452 counting only the distinct ones).

The product of its digits is 254016, while the sum is 41.

The square root of 67723664 is about 8229.4388630088. The cubic root of 67723664 is about 407.6118633514.

The spelling of 67723664 in words is "sixty-seven million, seven hundred twenty-three thousand, six hundred sixty-four".