67261540 has 24 divisors (see below), whose sum is σ = 142954560. Its totient is φ = 26579808.

The previous prime is 67261529. The next prime is 67261553. The reversal of 67261540 is 4516276.

It is a happy number.

It is a super-2 number, since 2×67261540² = 9048229526343200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18600 + ... + 21919.

It is an arithmetic number, because the mean of its divisors is an integer number (5956440).

Almost surely, 2^67261540 is an apocalyptic number.

It is an amenable number.

67261540 is an abundant number, since it is smaller than the sum of its proper divisors (75693020).

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

67261540 is a wasteful number, since it uses less digits than its factorization.

67261540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40611 (or 40609 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 67261540 is about 8201.3133094645. The cubic root of 67261540 is about 406.6826100829.

The spelling of 67261540 in words is "sixty-seven million, two hundred sixty-one thousand, five hundred forty".