67621081 has 8 divisors (see below), whose sum is σ = 76976064. Its totient is φ = 58800720.

The previous prime is 67621079. The next prime is 67621097. The reversal of 67621081 is 18012676.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67621081 - 2¹ = 67621079 is a prime.

It is a super-2 number, since 2×67621081² = 9145221191217122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67621051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133386 + ... + 133891.

It is an arithmetic number, because the mean of its divisors is an integer number (9622008).

Almost surely, 2^67621081 is an apocalyptic number.

It is an amenable number.

67621081 is a deficient number, since it is larger than the sum of its proper divisors (9354983).

67621081 is a wasteful number, since it uses less digits than its factorization.

67621081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267311.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 67621081 is about 8223.2038160318. The cubic root of 67621081 is about 407.4059521755.

The spelling of 67621081 in words is "sixty-seven million, six hundred twenty-one thousand, eighty-one".