67478661 has 48 divisors (see below), whose sum is σ = 109444608. Its totient is φ = 39859200.

The previous prime is 67478657. The next prime is 67478669. The reversal of 67478661 is 16687476.

It is not a de Polignac number, because 67478661 - 2² = 67478657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67478669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194290 + ... + 194636.

It is an arithmetic number, because the mean of its divisors is an integer number (2280096).

Almost surely, 2^67478661 is an apocalyptic number.

67478661 is the 4743-rd octagonal number.

It is an amenable number.

67478661 is a deficient number, since it is larger than the sum of its proper divisors (41965947).

67478661 is a wasteful number, since it uses less digits than its factorization.

67478661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 439 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 67478661 is about 8214.5396097408. The cubic root of 67478661 is about 407.1197320727.

The spelling of 67478661 in words is "sixty-seven million, four hundred seventy-eight thousand, six hundred sixty-one".