67377961 has 4 divisors (see below), whose sum is σ = 77003392. Its totient is φ = 57752532.

The previous prime is 67377943. The next prime is 67377979. The reversal of 67377961 is 16977376.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (67377943) and next prime (67377979).

It is a cyclic number.

It is not a de Polignac number, because 67377961 - 2⁵ = 67377929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67377161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812705 + ... + 4812718.

It is an arithmetic number, because the mean of its divisors is an integer number (19250848).

Almost surely, 2^67377961 is an apocalyptic number.

It is an amenable number.

67377961 is a deficient number, since it is larger than the sum of its proper divisors (9625431).

67377961 is an equidigital number, since it uses as much as digits as its factorization.

67377961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625430.

The product of its digits is 333396, while the sum is 46.

The square root of 67377961 is about 8208.4079455154. The cubic root of 67377961 is about 406.9171131167.

The spelling of 67377961 in words is "sixty-seven million, three hundred seventy-seven thousand, nine hundred sixty-one".