61621266 has 16 divisors (see below), whose sum is σ = 140848704. Its totient is φ = 17606064.

The previous prime is 61621223. The next prime is 61621283. The reversal of 61621266 is 66212616.

It is a nude number because it is divisible by every one of its digits.

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, 733545 + ... + 733628.

It is an arithmetic number, because the mean of its divisors is an integer number (8803044).

Almost surely, 2^61621266 is an apocalyptic number.

61621266 is an abundant number, since it is smaller than the sum of its proper divisors (79227438).

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

61621266 is a wasteful number, since it uses less digits than its factorization.

61621266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467185.

The product of its digits is 5184, while the sum is 30.

The square root of 61621266 is about 7849.9214008804. The cubic root of 61621266 is about 394.9816067919.

The spelling of 61621266 in words is "sixty-one million, six hundred twenty-one thousand, two hundred sixty-six".