77628061 has 8 divisors (see below), whose sum is σ = 91579904. Its totient is φ = 64391760.

The previous prime is 77627989. The next prime is 77628077. The reversal of 77628061 is 16082677.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77628061 - 2¹⁷ = 77496989 is a prime.

It is a super-2 number, since 2×77628061² = 12052231709239442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77628061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77620061) 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, 178650 + ... + 179083.

It is an arithmetic number, because the mean of its divisors is an integer number (11447488).

Almost surely, 2^77628061 is an apocalyptic number.

It is an amenable number.

77628061 is a deficient number, since it is larger than the sum of its proper divisors (13951843).

77628061 is a wasteful number, since it uses less digits than its factorization.

77628061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357771.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 77628061 is about 8810.6788047233. The cubic root of 77628061 is about 426.5856540389.

The spelling of 77628061 in words is "seventy-seven million, six hundred twenty-eight thousand, sixty-one".