67760921 has 4 divisors (see below), whose sum is σ = 70707072. Its totient is φ = 64814772.

The previous prime is 67760911. The next prime is 67760923. The reversal of 67760921 is 12906776.

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 a cyclic number.

It is not a de Polignac number, because 67760921 - 2¹⁰ = 67759897 is a prime.

It is a super-3 number, since 3×67760921³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67760923) 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, 1473041 + ... + 1473086.

It is an arithmetic number, because the mean of its divisors is an integer number (17676768).

Almost surely, 2^67760921 is an apocalyptic number.

It is an amenable number.

67760921 is a deficient number, since it is larger than the sum of its proper divisors (2946151).

67760921 is a wasteful number, since it uses less digits than its factorization.

67760921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946150.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 67760921 is about 8231.7021933498. The cubic root of 67760921 is about 407.6865965161.

The spelling of 67760921 in words is "sixty-seven million, seven hundred sixty thousand, nine hundred twenty-one".