67720464 has 180 divisors, whose sum is σ = 228207616. Its totient is φ = 18361728.

The previous prime is 67720403. The next prime is 67720483. The reversal of 67720464 is 46402776.

It is a super-2 number, since 2×67720464² = 9172122488750592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 533169 + ... + 533295.

Almost surely, 2^67720464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67720464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114103808).

67720464 is an abundant number, since it is smaller than the sum of its proper divisors (160487152).

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

67720464 is a wasteful number, since it uses less digits than its factorization.

67720464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 67720464 is about 8229.2444367633. The cubic root of 67720464 is about 407.6054432494.

The spelling of 67720464 in words is "sixty-seven million, seven hundred twenty thousand, four hundred sixty-four".